Part iii: fertilizer
if a bag of fertilizer covers 500 square feet, then how many bags will be needed to cover the garden? show you calculations in the space below.
part iv: cost
a bag of fertilizer costs $8.99 and tax is 8.25%. what will be the total amount mrs. thomas will need to cover her garden? show you calculations in the space below.

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

Diane’s bank is offering 5% interest, compounded monthly. if diane invests $10,500 and wants $20,000 when she withdrawals, how long should she keep her money in for? round to the nearest tenth of a year.

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota