A company that manufacturers batteries for cell phones wants to estimate the mean number of hours that battery will last. How many batteries must they test to be 95% confident that their mean is within 1.5 hours of the population mean (Assume that the population standard deviation is 3.85)

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

answer: i think it is (1,-2)

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.

the answer is:

the lateral area is equal to

to find the lateral area of the square pyramid, first we need to find the perimeter of the base, and then, find the lateral area using the following formulas:

where,

s, is the base length

slant height, is the height of a the side of the pyramid

we are given:

now, calculating the perimeter of the base, we have:

then, calculating the lateral area:

hence, we have that the lateral area is equal to

have a nice day!