The diameter of a semicircle is 4 miles. What is the semicircle's radius?

2 miles

Step-by-step explanation:

The diameter is the line segment that cuts through the center of the circle and has endpoints on the circle. The radius is simply half of the diameter: d = 2r

Here, the diameter is 4 miles, so plug this in:

d = 2r

4 = 2r

r = 4/2 = 2 miles

Hope this helps!

2 miles

Step-by-step explanation:

The diameter is twice the radius, or

d=2r

We know the diameter is 4, so we can substitute that in for d

4=2r

We want to find r, so we need to solve for it. To do that, we need to get r by itself. r is being multiplied by 2. To undo this, divide both sides by 2, since division is the opposite of multiplication

4/2=2r/2

The 2s on the right will cancel, and we are left with

2=r

So, the radius is 2 miles

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)