Follow the order of operations
1. parentheses (13+5) = 18
2. multiplication 21*(13+5) = 21*18 = 378
3. add 9 + 21*(13+5) = 9 + 378 = 387
Hope this helps!
Answer:
Step-by-step explanation:
(x÷5)*4=80÷(5*4)
(x÷5)*4 = 80÷20
(x÷5)*4 = 4
x÷5 = 4÷4

Answer:
The answer is "
"
Step-by-step explanation:
Given:
When
confidence level so, the z:

When 98% confidence interval estimate of the population mean is,

required c.s.a = 12 pl sq cm