exam
Maths Puzzle
Numerical Ability
I dont understand this:
Kendra invested $850, part of it at 9% and part of it at 12%. If her interest for one year was $81 how much did she invest at each rate?
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exam Other Question
the formula m=0.3048 coverts length in feet f to length in meters m. a building that is 270 feet tall, is how tall in meters?
I am supposed to solve for x and the base of the logarithm is 10 but I can not figure it out.
log[10+3x]=7log4