Answer:
4
Step-by-step explanation:
1. 8 to the power 2/3, can be just told as take the square of 8 and perform cube root or perform cube root of 8 and then square the result.
2. 8^2 = 64
3 .3√64
4. 4. 3√8=2
5.2^2 = 4.
Answer:
2Na + F2 ---> 2NaF
Step-by-step explanation:
Answer:
1) Both 15.
2) 25 and -25.
Step-by-step explanation:
1) Let the 2 numbers be x and 30 - x.
The product = x(30 - x)
f(x) = x(30 - x)
f(x) = 30x - x^2
Finding the derivative:
f'(x) = 30 - 2x
Finding the maximum:
30 - 2x = 0
x = 15.
This gives a maximum f(x) because f"(x) = -2.
So the numbers are 15 and 30 - 15 = 15.
2). If one number is x the other is y.
x - y = 50
y = x - 50
The product =
x(x - 50)
= x^2 - 50x
Finding the derivative:
2x - 50 = 0 for a minimum value.
2x = 50
x = 25.
So the numbers are 25 and 25-50 = -25.
Answer:
$405.60
Step-by-step explanation:
40x13=520
520x.22= 114.4
520-114.4=405.60
$84.42........... hope this helps you :)
