Answer:
Radius is 3.6
Step-by-step explanation:
Using Pythagorean Theorem we find the Hypotenuse with the side lengths which are 3 and 2.
The quick equation to solve that would be

Those angles are less than 90° so they would be acute angles
Answer:
4
Step-by-step explanation:
We'll do two things here. First remember that when a number is raised to an exponent, and the result is raised to another exponent, you can simply multiply those exponents and apply them to the base. So we can multiply -1/2 and -2/3, giving us 1/3, which is what we'll raise 64 to.
The other thing to remember is that a fractional exponent is the same as a root of that base. So raising a number to the power of 1/3 just means we want the cube root of that number.
Applying those and we get:

(13*8)/2 =52
11*5=55*2=110
52+110=162
A=162