Isaac uses the fermi process to estimate the number of playing cards it would take to cover his backyard. both the cards and his backyard are rectangular in shape.

he estimates the playing cards to be about 3 in. long and 2 in. wide.
he estimates his backyard to be about 40 ft long and 20 ft wide.

which expression should isaac use in the process?

i got 8×10^2 / 6×10^0 but apparently, that's wrong.

Answer pls man im trying to get out of summer school

The point a is at –2 and the point b is at 7. marissa would like to divide this line segment in a 4: 3 ratio, and she would like to use the formula x = (x2 – x1) + x1. what values should she substitute into the formula? a = a + b = x1 = x2 =

Atest of sobriety involves measuring the subject's motor skills. a sample of 31 randomly selected sober subjects take the test and produce a mean score of 64.4 with a standard deviation of 2. a claim is made that the true mean score for all sober subjects is equal to 65. for each part below, enter only a numeric value in the answer box. for example, do not type "z =" or "t =" before your answers. round each of your answers to 3 places after the decimal point. (a) calculate the value of the test statistic used in this test. test statistic's value = (b) use your calculator to find the p-value of this test. p-value = (c) use your calculator to find the critical value(s) used to test this claim at the 0.2 significance level. if there are two critical values, then list them both with a comma between them. critical value(s) =