2. A pilot time study of 45 cycles of an assembly operation for a unique job showed an average normal time of 3.20 minutes and corresponding standard deviation of 1.28 min. Is this sample adequate in size for this plant to be 99% confident that the normal time is within 5% of the true value

168

step-by-step explanation:

i am pretty sure that the answer is 168

i believe your answer is 99.7% of 7-year-old children are between 46.6 inches and 49.5 inches tall.

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;

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!