3 years ago

Math question screen shot below

Mathematics

2 answers:

natulia [17]3 years ago

8 0

Answer:

14.25-d

Step-by-step explanation:

The original amount of money he has is 14.25 so that is the first number in your equation. H ethen buys the card which costs (d) dollars so you are subtracting that from 14.25 since he is spending it. This means the final equation is 14.25-d.

mestny [16]3 years ago

8 0

14.25 - d is the answer

Hope this helped

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A consumer group is interested in estimating the proportion of packages of ground beef sold at a particular store that have an a

storchak [24]

Answer: 267.

Step-by-step explanation:

When there is no prior information for the population proportion, then the formula we use to find the sample size to estimate the confidence interval :

$n=0.25(\dfrac{z^*}{E})^2$ , where z* = Critical z-value and E + amrgin of error.

Let p = proportion of packages of ground beef sold at a particular store that have an actual fat content exceeding the fat content stated on the label.

Since , we have no prior information about p. so we use above formula

with E = 0.06 and critical value for 95% confidence =z* =1.96 [By z-table ] , we get

$n=0.25(\dfrac{1.96}{0.06})^2=0.25(32.6666)^2\\\\=(0.25)(1067.111111)\\\\=266.777777778\approx267$