A new roll of wrapping paper has 658 yards of paper. Drew used 216 yards from the roll to wrap a gift. Which equation most closely estimates the number of yards of wrapping paper left on the roll? CLEAR SUBMIT

6−212=312

612−212=4

612−2=412

7−2=5

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Which strategy is used by public health to reduce the incidence of food poisoning?