Math Answers

The PE classes collected canned food for a food drive last Thanksgiving. The goal was to collect 600 cans. They collected 1,500 cans. What percent of their goal did they reach?

Given: x = e^2t - 1 and y = e^2t + 1. Find y’.

Given: x = 2t + 1 and y = 4t - 1. Find y’.

Given: x = cost and y = tsint + cost. Find y’.

Given: x = csct and y = cott. Find y’.

Given: x = 1 - cost and y = 1 - sint. Find y’.

(D²+DD')Z=sin(x+y)

On the Standford-Binet test, the mean IQ is 100. A class of 21 kindergarten pupils were tested with a resulting mean of 108 and a standard deviation of 7.09. What is the lower bound of the 90% confidence interval of the average IQ of the kindergarten pupils?

On the Standford-Binet test, the mean IQ is 100. A class of 21 kindergarten pupils were tested with a resulting mean of 108 and a standard deviation of 7.07. What is the upper bound of the 90% confidence interval of the average IQ of the kindergarten pupils?

On the Standford-Binet test, the mean IQ is 100. A class of 21 kindergarten pupils were tested with a resulting mean of 99 and a standard deviation of 6.25. What is the margin of error of the 90% confidence interval of the average IQ of the kindergarten pupils?