312 Answered Questions for the topic College Math

College Math Calculus

6d

#### Which one of the following matrices is BB^T?

Given the matrix B:1 3 2 2 -1 0 What is BBT?

18d

#### Find the dimensions of the investigation area. Please help.

Police used 600ft of yellow tape to fence off a rectangular-shaped area for an investigation. The width of each side used 60ft less tape than the length of each side. Find the dimensions of the...
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10/25/20

#### Which distribution should you use for this problem? (Enter your answer in the form z or tdf where df is the degrees of freedom.)

A hospital is trying to cut down on emergency room wait times. It is interested in the amount of time patients must wait before being called back to be examined. An investigation committee randomly...
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10/25/20

#### How much area is in both tails (combined)? (Enter an exact number as an integer, fraction, or decimal.)

The mean age for all Foothill College students for a recent Fall term was 33.2. The population standard deviation has been pretty consistent at 15. Suppose that twenty-five Winter students were...
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10/15/20

#### Let X = the average of the 49 races.

Suppose that a category of world class runners are known to run a marathon (26 miles) in an average of 144 minutes with a standard deviation of 13 minutes. Consider 49 of the races.Let X = the...
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09/13/20

#### problem solving

The store is selling lemons at $0.39 each. Each lemon yields about 2 tablespoons of juice. How much will it cost to buy enough lemons to make two 9-inch lemon pies, each requiring half a cup of...
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09/04/20

#### For each of the following accounts, determine the growth factor and percent change for the account value over one compounding period.

Account C has a 3.9% APR compounded daily (365 times a year). Determine the account value's growth factor and percent change per compounding period.Daily Growth Factor: .39/365+1What is the daily...
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College Math

08/27/20

#### A rider in a road bike race had an average linear speed of 40.075 km/hr. The wheel of his bicycle had a diameter of 67 cm. What is his angular speed, in revolutions per hour?

College Math Precalculus

08/27/20

#### Savanna is playing a game with her friends. She tells them to each pick a number, and then she directs them to: Multiply their number by 5. Subtract 8 from that number. Divide that number by 2.

Zach says his "new" number is n. What number did Zach start with?

08/05/20

#### Solving Systems of Equations with Row Operations

x + 2z = 3 2x + y - 3z = 4 3x - 4y + 5z = -12

08/05/20

#### Solving Systems of Equations with Row Operations

x + y + z = 3 3x - y - 2z = -4 3x + 4y + 3z = 11

07/25/20

#### Systems of Equations/Matrices

Solve each of the following systems of equations. If the system has a unique solution (one solution), state this and exhibit the solution. If the system is inconsistent (has no solutions) state...
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05/30/20

#### Statistics Question Data from the National Association of Realtors

Data from the National Association of Realtors indicates that the mean price of a home in Denver, Colorado, during April through June of 2012 was 260.7 thousand dollars. A random sample of 50 homes...
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05/30/20

#### Statistics question Hypothesis tests for Proportions

A telecommunications company provided its cable TV subscribers with free access to a new sports channel for a period of one month. If then chose a sample of 400 television viewers and asked them...
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College Math

05/20/20

#### How can I put TOMORROW into numbers?

05/17/20

#### PLEASE HELP ME SOLVE THIS QUESTION

Suppose that f : [0, 3] → R is continuous on [0, 3], differentiable on (0, 3) and f(0) = 0, f(1) = 1, f(3) = 1.
Show that there exists c1 ∈ (0, 3) such that f'(c1) = 1.
Show that there exists c2 ∈...
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College Math

05/01/20

#### A chef is going to use a mixture of two brands of Italian dressing.

A chef is going to use a mixture of two brands of Italian dressing. The first brand contains 9% vinegar, and the second brand contains 14% vinegar. The chef wants to make 340 millilitres of a...
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#### Calculus question

The integral a=-5, b=5, ∫√(25−x^2)dx gives the area of a region R in the xy−plane.a) Identify and sketch the region R.b) Find the area of R using a known geometric formula, not by evaluating...
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#### Calculus Question help

A particle moves along a line with velocity v(t) = cos(6πt) for 0 ≤ t ≤ 4.a) Find the displacement.b) Find the distance traveled

04/21/20

#### Two Population Means

At a recent faculty meeting, we were wondering if freshmen have more free time than seniors. We took a sample of 25 freshmen and 23 seniors. Each student was asked to record the amount of free time...
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#### Equation of Hyperbola — Help!!

Hi! please help me!Question:A light on a wall produces a shadow in the shape of a hyperbola. If the distance between the two vertices of the hyperbola is 10 inches and the distance between the two...
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02/26/20

#### Estimate amount of money needed for a 15% tip

Here is the question: Suppose that you want to leave your server a 15% tip on the dinner bill. The total bill amounts to $24.19. Estimate the amount of money that you should leave for a 25% tip....
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02/26/20

#### School board 8% salary cut (basic Algebra college math)

Here is the question: A school board announces an across the board salary cut 8%. The superintendent makes $193,780 after the cut has been mad. What was her salary before the 8% cut?

02/23/20

#### Supremum and infimum

X1 = { x | x = 0 or x = (1/n) ; n € N(N - set of natural numbers)Find the supremum and infimum(if they exists ) of set X1

02/21/20

#### EXPECTED VALUE GAMBLING WHEEL QUESTION

Suppose you bet $1 on red at the roulette wheel. There are 18 red numbers and 20 nonred numbers (including the green 0 and 00). You win $1 if a red number comes up, and you lose $1 if any other...
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