exam Maths Puzzle Numerical Ability

what meathod do i use b/c i dont get it.
(-5a^2)(-2ab^4)

Read Solution (Total 0)

exam Other Question

write equation in standard form?

y-4=-(x-1)
Help!

Problem:
The distance from the earth to the sun is approximately 9.3 * 10^7 miles. the distance from alpha centauri, the closest stars system, to the sun is approximatel