select the correct answer. lucy is knitting a blanket and needs to buy some more yarn. at her local craft…

select the correct answer. lucy is knitting a blanket and needs to buy some more yarn. at her local craft store, 2 balls of yarn cost $7 and 8 balls of yarn cost $28. if lucy needs 20 balls of yarn to finish the blanket, how much money will it cost? a. $49 b. $56 c. $70 d. $140

select the correct answer. lucy is knitting a blanket and needs to buy some more yarn. at her local craft store, 2 balls of yarn cost $7 and 8 balls of yarn cost $28. if lucy needs 20 balls of yarn to finish the blanket, how much money will it cost? a. $49 b. $56 c. $70 d. $140

Answer

Explanation:

Step1: Find the cost per ball

First, check the cost - per - ball consistency. For the first case, if 2 balls cost $7, then the cost per ball is $7\div2 = 3.5$. For the second case, if 8 balls cost $28, then the cost per ball is $28\div8=3.5$.

Step2: Calculate the cost for 20 balls

Since the cost per ball is $3.5$, to find the cost of 20 balls, we multiply the number of balls by the cost per ball. So the cost is $3.5\times20 = 70$.

Answer:

C. $70