Suppose n represents a power of 10. What is the value of n when 5 is rounded to the nearest power of 10?

What is the rule for reflection across the y axis

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side