35.7 x 10^-2 proper scientific notation

What is 32+4 x (16 x 1/2) -2 show your work}

Fiona races bmx around a circular dirt course. if the radius of the course is 70 meters, what is the total distance fiona covers in two laps of the race? a. about 30,772 meters b. about 15,386 meters c. about 879.2 meters d. about 439.6 meters e. about 219.8 meters23 points hurry

The table above shows approximate conversions from gallons to liters. what is the value of x?