A company that sells phones has received complaints from customers that their certain new types of phones cracks at a temperature of over 38⁰C. they decide to test sample of 100 phones by putting them at this temperature. the sample tests revealed that 30% of the phones cracked. because the company did not test all this type of phones due to potential destructive testing, they are interested in using the sample test to estimate the results had all phones been tested a how many phones should have been tested for the percentage of phones that cracked to be within +-4% with a 95% confidence interval?​

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3. 8,935,200 minutes

4. 227,040 feet

1. she sold more on day 2 because if you turn .85 into a fraction{85/100} and you give 7/9 and 85/100 the same denominator{180} you can see which one has the bigger numerator and that one will be the most sold.

2. yes it is in simplest form, because if you look at 38 and 53 's greatest common factor, you cant find one so you cant reduce it

3. no, this is not a prime factorization because the numbers are not all prime numbers, the correct prime factorization is:   2 x 5 x 2

4.   in 12 days he will run and play trumpet again

work 4 4: 123123123123

                123412341234     in 12 days he will play the trumpet and run on the same day

step-by-step explanation:

i am normally pretty good at math, im new to this site, but im 1 grade ahead in my math, i luv math try my answers out, see how they work