Mark bought an electronic tablet on sale for 1/4 off the original price of 825.00. he also wanted to use a coupon gor 1/5 off the sales price. before taxes, how much did mark pay for the tablet?

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

3x = 729 solve for x plz . it's urgent. will mark