Compute the mean and standard deviation for the sample below, rounding each to the nearest hundredth. 13, 15, 17, 19, 21, 22, 27.
The mean of the sample is
(Type an integer or a decimal. Round to two decimal places as needed.)
The standard deviation of the sample is
(Type an integer or a decimal. Round to two decimal places as needed.)

Simonne used the following steps to simplify the given expression. 12 - 3(-2x + 4) step 1: 12 + (–3)·(–2x) + (–3)·(4) step 2: 12 + 6x + (–12) step 3: 12 + (–12) + 6x step 4: 0 + 6x step 5: 6x what property of real numbers was used to transition from step 3 to step 4? a. identity property of addition b. inverse property of addition c. associative property of addition d. commutative property of addition

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

Tim has obtained a 3/27 balloon mortgage. after the initial period, he decided to refinance the balloon payment with a new 30-year mortgage. how many years will he be paying for his mortgage in total?