book Maths Puzzle Numerical Ability

How do you multiply to find the number in standard form of an exponent?

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I need help. Here is the problem I have to solve.

Gina is paid 1.5 times normal hourly pay for each she works over 40 hours in a week. Last week she worked 48 hours and earned $634.40. What is her normal hourly rate?

Please help me. Determine the coordinates for graphing the equation 3Y + 2X = 4Y - 2
A) (0,2),(-1,0) B) (2,0),(0,-1) C) (3,2),(4,-2) D) (2,3),(-2,4)