Recent questions and answers in Mathematics

by lemak (Influencer) in Mathematics answered May 15

Colin invests £2900 into his bank account. He receives 3% per year compound interest. How much will Colin have after 4 years? Give your answer to the nearest penny where appropriate.

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by tullu (Supporter) in Mathematics asked Apr 26

Who can solve this question for me?

Two circles are concentric if they have the same center. On a coordinate plane, a circle has center (4, 6) and has a radius of 2 units. Which equation represents a circle that is concentric with the circle shown but has a radius that is twice as large? (x – 4)2 + (y – 6)2 = 4 (x – 4)2 + (y – 6)2 = 16 (x – 6)2 + (y – 4)2 = 16 (x – 6)2 + (y – 4)2 = 4

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by tullu (Supporter) in Mathematics asked Apr 26

Who can solve this for me?

The height in feet of a baseball can be modeled by the function y = −16t2 + 64t, where t is the time in seconds after the ball is hit. Find the baseball's maximum height and the time it takes to reach this height. Then find how long the baseball is in the air.

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by Eyob in Mathematics asked Apr 16

A rectangle and a parallelogram have the same base and the same height.

rectangle and a parallelogram have the same base and the same height. Use the drop‐down menu to compare the areas of the two figures. The area of the rectangle is. (((((Here is were AB OR D GOES , so the answer goes here)))) the area of the parallelogram. Options. A:equal to B:Greater than C:Less than

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by Kelly (Junior Supporter) in Mathematics asked Apr 15

A house has an electric heating system that consists of a 300-W fan and an electric resistance heating element placed in a duct. Air flows steadily through the duct at a rate of 0. 66 kg/s and experiences a temperature rise of 7°C. The rate of heat loss from the air in the duct is estimated to be 300 W. Determine the power rating of the electric resistance heating element. The constant pressure specific heat of air at room temperature is cp = 1. 005 kJ/kg·K

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by Kelly (Junior Supporter) in Mathematics asked Apr 15

Juan and Matthew each have gardens. Juan's garden is 16 feet long and 12 feet wide. Matthew's garden is 18 feet long and 21 feet wide. Area is found by multiplying length and width. What is the total area of the two gardens?

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by Sami (Senior Supporter) in Mathematics asked Apr 14

The table show the value of a car as it relates to its age. A 2-column table with 5 rows.

The table show the value of a car as it relates to its age. A 2-column table with 5 rows. The first column is labeled age (years) with entries 0, 1, 2, 3, 4. The second column is labeled value (dollar sign) with entries 20,000; 18,000; 16,200; 14,580; 13,122. Which statements describe the value of the car as a function of x, its age in years? Check all that apply. The relationship is quadratic. The relationship is exponential. The domain is {x | x < 0}. The range is {V | 0 V 20,000}. The value, V, is represented by the equation V = 20,000(0.9)x.

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by Jaky in Mathematics asked Apr 13

Solve it for me

Consider a chocolate manufacturing company that can produces two types of chocolate - A and B. Both the chocolates require Milk and Choco only. To manufacture each unit of A and B, the following quantities are required: • Each unit of A requires 1 unit of Milk and 2 units of Choco Each unit of B requires 2 unit of Milk and 1 units of Choco Currently, the milk price is 1$/unit and the choco price is 1$/unit. We can sell chocolate A for 10$ and Chocolate B for 8$. Assume we are planning for the next two years. The milk prices may go up 20% by probability of 40% and may go down 10% by probability of 60%. The choco prices may go up 30% by probability of 50% and may go down 20% by probability of 50%. The current demand for A is 1000 units per year. The demand is assumed to stay fix. We have limited budget. Lets calculate the profit we may get from producing any of these chocolates to decide about best option for the next two years (decide about to produce A or B?). The discount rate is k=0.1. Hint: assume we have period 0, 1, 2.

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by kassa (Influencer) in Mathematics answered Apr 12

Consider this scenario: Fred earns $40 mowing lawns. He spends $10 on mp3s, puts half of what is left in a savings account, and gets another $5 for washing his neighbor's car.

Write the expression that represents the number of dollars Fred keeps (and does not put in his savings account). Remember the order of operations. How much money does Fred keep?

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by lemak (Influencer) in Mathematics answered Apr 12

What is an equation of the the line that passes through the point (-1,4) and is parallel to the line x+y=4

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2 answers

by Sami (Senior Supporter) in Mathematics answered Apr 10

Write the standard equation of the circle with the center (-14,-5) that passes through the point (-7,5).

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by Sami (Senior Supporter) in Mathematics asked Apr 8

A population of 200 laboratory mice contains 120 white mice and 80 gray mice. Of the mice, 50 are male and 150 are female. If the events of selecting a male mouse and selecting a white mouse are independent, how many of the mice are white and male? Show your work.

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by Sami (Senior Supporter) in Mathematics asked Apr 8

Suppose A and B are independent events. The probability that event A will not occur is 0.1 and the probability that event B will occur is 0.7. Find P(A), P(not B) and P(A and B).

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by kassa (Influencer) in Mathematics answered Apr 7

A teacher bought 12 sheets of stickers to use on the homework of her students. Each sheet had 48 stickers. At the end of the year, the teacher had 123 stickers remaining. Estimate how many stickers the teacher used.

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by Darios (Junior Supporter) in Mathematics asked Apr 7

Can you answer this question please? A teacher bought 12 sheets of stickers to use on the homework of her students. Each sheet had 48 stickers. At the end of the year, the teacher had 123 stickers remaining. Estimate how many stickers the teacher used.

Help! A teacher bought 12 sheets of stickers to use on the homework of her students. Each sheet had 48 stickers. At the end of the year, the teacher had 123 stickers remaining. Estimate how many stickers the teacher used.

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by Tame in Mathematics answered Apr 6

how tall is the table?

it is just for fun

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2 answers

by Tame in Mathematics asked Apr 6

Find the mean, median, and mode of the data set.

Find the mean, median, and mode of the data set. Round to the hundredths, if necessary. 29,300 24,350 32,400 15,100 14,200 21,950 27,450 29,400 15,200 35,050 16,050 11,500 13,050 11,500 11,600 11,100 21,450

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by Sami (Senior Supporter) in Mathematics answered Apr 3

Which 3 numbers have the same answer whether they’re added or multiplied together?

just relaxing and refreshing simple maths.

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1 answer

by kassa (Influencer) in Mathematics answered Apr 2

How many four-digit odd numbers can be formed from the digits 0,1, 2, 3, 5, 7 if each digit can only be used once? Given numbers : 0, 1, 2, 3, 5, 7

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by tullu (Supporter) in Mathematics answered Apr 2

How many four digit numbers can be formed from the digits 1, 3, 5, 7, 8, and 9 where a digit is used at most once if the numbers must be even?

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by kassa (Influencer) in Mathematics answered Apr 1

What is the height of a cylinder if the volume is 250 cm3 and the radius is 7.5 cm?

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by kassa (Influencer) in Mathematics answered Jan 28

The sum is 22, but the difference is 6. What are the two numbers?

The sum of two numbers is 22, but the difference is 6. What are the two numbers?

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