Are theese rational

-3/8 + 3/5

A researcher wants to know if the average time in jail for robbery has increased from what it was when the average sentence was 7 years. he obtains data on 400 more-recent robberies and finds an average time served of 7.5 years.

A nationwide furniture company wants to survey their customers to determine whether or not they are providing quality customer service across the United States. They have 140 stores with an average of about 3,000 customers each per month.

2. There are 284 people in line to ride on a hayride. The hay wagon holds 9 passengers. How many hayrides will it take for all the people in line to get a turn? A. 32 hayrides B. 293 hayrides C. 31 hayrides D. 2,556 hayrides E.

Mill has $500.00. He gives 50% of it to Jill. He gives 20% of it to Phil. He keeps the rest. How much does each person get?

If 14m-81 + 5=21 what are the 2 possible values of m?

Which of the following is a behavioral adaption of a spider? a. poisonous venom b. web spinning c. eight legs d. body color

A family pays $45 each month for cable tv. The cost increases 7%. How many dollars is the increase? What is the new monthly cost?

The circumference of a large crater is about 219 m. what is the radius of the crater?

A rectangular pen is made with 100 m of fencing in three sides. The fourth is a stone wall. Find the greatest possible area of such an enclosure.

Simplify - 2 (v+5) + 5 (4v-2)