Assume that a set of test scores is normally distributed with a mean of 80 and a standard deviation of 10. Use the 68-95-99.7 rule to find the following quantities.

a. The percentage of scores less than 80 is _%.

Consider circle h with a 3 centimeter radius. if the length of minor arc what is the measure of zrst?

Tessa bought stock in a restaurant for $253.00. her stock is now worth $333.96. what is the percentage increase of the value of tessa's stock? a.) 81% b.) 32% c.) 24% d.) 76%

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.