Frankie is practicing for a 5-kilometer race. his normal time is 31 minutes 21 seconds. yesterday it took him only 29 minutes 38 seconds. how much faster was frankie yesterday than his normal time?

Jonathan pays $1.90 per pound for potatoes. he buys 8.3 pounds of potatoes. he determines that he will pay $15.77, before tax, for the potatoes. which best describes the reasonableness of jonathan’s solution? jonathan’s answer is reasonable because there are two decimal places in the factors and two in the product. jonathan’s answer is unreasonable because there are three decimal places in the factors and two in the product. jonathan’s answer is reasonable because is 16, and 16 is close to 15.77. jonathan’s answer is unreasonable because is 8, and 8 is not very close to 15.77.

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c