Is 12.89 a irrational number

Find the inverse of y=9x^2-4

What is the equivalent expression in exponential notation of - 2· - 2· - 2

1. The US Mint has a specification that pennies have a mean weight of 2.5g. From a sample of 37 pennies, the mean weight is found to be 2.49910g. and the standard deviation is found to be 0.01648g. Use a 0.

5. Shirley buys a fax machine and sells it to De at a gain of 25% on the cost price. Devi then ses the fax machine to Amirah at a loss of 250 on the price at which she buys it from Shirley. If Amirah pays $360 for the fax machine.

At Silver Gym, membership is $30 per month, and personal training sessions are $45 each. At Fit Factor, membership is $90 per month, and personal training sessions are $35 each.

The low temperature (t) is 75 Degree F for today and the maximum temperature is 92 degree F. Write the sentence as an inequality.

A change purse contains an equal number of pennies, nickels, and dimes. the total value of the coins is $2.56. how many coins of each type does the purse contain?

A 2 pounds of trail mix. Write a division A group of 5 friends are sharing 2 pounds of trail mix. Wri problem and a fraction to represent this situation

A climber is on a hike. after 2 hours he is at an altitude of 400 feet. After 6 hours, he is at an altitude of 700 feet. What is the average rate of change?

Joe is a car salesman. He earns 300 for every car he sells plus a 3 percent commission. IfJjoe sells 3 cars in one week for a total of 35,243, what are his total earnings for the week