Multiple choice

1.   Find the area of a triangle with a base of 10 in. and an altitude of 14 in. 

A. 24 sq. in. 

B. 70 sq. in. 

C. 140 sq. in. 

D. 280 sq. in. 

2.   Suppose you're given the formula R = s + 2t. If you know that s is three times greater than t, how could you rewrite the formula? 

A. R = 3(s + 2t) 

B. R = 3(s + t) 

C. R = 5s 

D. R = 5t 

3.   During a four-week period, you worked the following hours: 

Week 1—36 3/8 hr 

Week 2—41 1/4 hr 

Week 3—41 1/2 hr 

Week 4—38 3/8 hr 

What is the average number of hours you worked in one week? 

A. 38 1/4 

B. 38 3/4 

C. 38 1/8 

D. 39 3/8 

4.   The expression a = 3b2 + 2 can be written in words as the quantity a is equal to 

A. three times the quantity two plus b squared. 

B. three times the square root of b plus two. 

C. two more than three times the quantity b squared. 

D. two plus the square root of three × b.