Use the normal approximation to the binomal to find the probability for n=50, p=0.9 and x< or equal to 40. round z value calculations to 2 decimal places and final answer to 4 decimal places

What is the volume of this square pyramid?

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

Does anyone know how to do geometryme with this problem