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ASHA 777 [7]
3 years ago
12

A local bookstore has a sale on all their paperbacks giving a 10% discount. You also received a coupon in the mail for $4 off yo

ur purchase. If you buy 2 paperbacks at $8 each, is it less expensive for you to apply the discount before the coupon or after the coupon?
Mathematics
1 answer:
oee [108]3 years ago
3 0

Answer:

Discount before the Coupon

Step-by-step explanation:

The cost of two paperbacks at $8 each=2 X $8 =$16

First, we determine for the case in which the coupon is applied first.

If the $4 Coupon is applied,

Cost=$16-$4 = $12

If the 10% discount is further applied,

Amount to be paid = $12-(10% of $12) =$12-1.2= $10.8

However if the discount is applied first,

Book Cost=$16-(10% of $16)=16-1.6=14.4

If the Coupon is then applied,

Amount to be paid= $(14.4-4)=$10.4

Since $10.4 is less than $10.8, we conclude therefore that it is less expensive to apply the discount first.

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28)A regression equation is obtained for a collection of paired data. It is found that the total variation is 24.488, the explai
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Answer: The coefficient of determination = 0.6291

Step-by-step explanation:

Given: Total variation is 24.488, the explained variation is 15.405, and the unexplained variation is 9.083.

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Substituting given values, we get

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Therefore, the coefficient of determination = 0.6291

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3 years ago
A firm buys components from two suppliers: 60 percent from supplier A and the rest from supplier B. It so happens that 9 percent
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Answer:

0.114,0.5263

Step-by-step explanation:

Given that a firm buys  components from two suppliers:

A : 60%  Defective 9%

B:40%  Defective 15%

a) the probability that the next component the firm buys is defective

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= 0.60(0.09)+0.40(0.15)\\= 0.054+0.06\\=0.114

b)  the probability that the component that the firm buys is from supplier B if we know that it is defective

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3 years ago
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