Jamal buys 33 bolts that cost $0.38 each. Part A Which equation represents the best estimate for the total cost of all of the bolts? A. $0.30 × 30 = $9 B. $0.40 × 30 = $12 C. $0.50 × 30 = $15 D. $0.40 × 40 = $16 Part B What is the actual total cost of all of the bolts? E

The equation that represents the best estimate is

B. $0.40 × 30 = $12

The actual total cost of all the bolts is

$12.54

Explanation:

From the question given above, we know that

total bolts = 33

cost of 1 bolt = $0.38 approximating the values,

Total bolts = 33 ≅ 30

Cost of 1 bolt = $0.38 ≅ $0.40

Therefore,

Cost of all bolts = Total bolts x cost price for 1 bolts

= 33 x $0.38 = $12.54 ≅ $12.00