A discrete random variable has a mean of 400 and a variance of 64. what is the standard deviation?

There are 200 student in middle school and three fifths of them are girls how many are boys?

1. Valley Savings and Trust pays 5% interest compounded quarterly on regular savings accounts. Leland Davis deposited $2,000 in a regular savings account. He made no other deposits or withdrawals during the interest period a.

Gary is paid $15.50 per hour in addition to a weekly salary of $50. This week he wants to earn more than $400. Write an inequality to represent this situation. Use h as the variable.

A box contains five keys, only one of which will open a lock. keys are randomly selected and tried, one at a time, until the lock is opened (keys that do not work are discarded before another is tried).

How do you write 5x 4y=4 in slope-intercept form

odún and aderonke have 6:4 in 80 units of transcorp's share. how many units of this shares belong to odún

What is 49:21 lowest form

N two days, 48,000 gallons of oil gushed out of a well. At what rate did the oil flow from the well?

Which of the following is the equation of a circle with a radius of 5 cm and center at (3, 6) ? (x 3) 2 + (y + 6) 2 = 10 (x 3) 2 + (y + 6) 2 = 25 (x + 3) 2 + (y 6) 2 = 25 (x + 3) 2 + (y 6) 2 = 10

A sociologist studying the difference in ages between husbands and wives obtained a random sample of 55 married couples. The mean of the husbands' ages was 38.5 years with standard deviation 12.6 years. The mean of the wives' ages was 36.