How many 5 digit numbers are even if repetition is not allowed?

Which statement is always true? a negative exponent cannot be part of an expression's numerator. a negative base raised to the power of 2 has a negative value. a negative base raised to the power of 2 has a positive value. any number to the first power is zero.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

Arectangle plot measure 20ft. by 30ft. a 3-ft.-wide sidewalk surrounds it.find the area of the sidewalk.