Answer:
Once the rules of exponents are understood, you can begin solving more complicated expressions more easily. Recall that when you take a power to a power, you multiply the exponents, (xa)b= xa·b.
What happens when you raise an entire expression inside parentheses to a power? You can use the techniques you already know to simplify this expression.
(2a)4 = (2a)(2a)(2a)(2a) = (2 • 2 • 2 • 2)(a • a • a • a) = (24)(a4) = 16a4
Notice that the exponent is applied to each factor of 2a. So, we can eliminate the middle steps.
(2a)4 = (24)(a4), applying the 4 to each factor, 2 and a.
= 16a4
The product of two or more numbers raised to a power is equal to the product of each number raised to the same power.
Mike´s salary=x
Ron´s salary=2x
We can suggest the following equation:
x+2x=441
3x=441
x=441/3
x=147
Mike´s salary=147
Ron´s salary=2x=2(147)=294
Answer: Ron´s salary is $294 and Mike´s salry is $147.
1/7 as a decimal is 0.1428571429
But if you round that to the nearest 2 decimal place it is 0.14
I really hope this helps.
C. 248 teachers
part/whole = percent/100
62/x = 25/100
Cross multiply
6200 = 25x
Divide by 25
x = 248
