Mary works in a factory that produces 1,000 telephones each day. when 30 telephones were sampled, it was found that 9 were defective. estimate how many telephones are defective each day.

300 telephones

Step-by-step explanation:

First, divide 30 from 9 (or write the 9 out of 30 as a probability), making it look like this: 9/30. This equals 0.3. Then write the percentage/decimal into a general percent equation (y is x% of z).

0.3 X 1000. your result should be 300.

is there more to this question?

363 square inches

step-by-step explanation:

surface area of a pyramid is b + 1/2ph

b is the area of the base: 11 x 11 = 121

p is the perimeter of the base: 11 + 11 + 11 + 11 = 44

h is the height of the pyramid: 11

121 + 1/2(44)(11)

121 + 242

363