HELLPPP PLSSS. Multiply. Write your answer in scientific notation. (3 x 10^)(3 x 10')​

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6

Can anyone explain to me how to do this? anything will .