Answer:
Step-by-step explanation:
9*21*2+18*9*2+21*18+35*20+(35*20-21*18)+35*15*2+15*20*2
= 378 + 324+ 378 + 700 + 700 - 378 + 1050 + 600
= 3752
Answer: 97.72%
Step-by-step explanation:
Given : A shoe manufacturer collected data regarding men's shoe sizes and found that the distribution of sizes exactly fits the normal curve.
Let x be the random variable that represents the shoe sizees.
Also, The population mean =
; Standard deviation: 
Formula for z:-

Put x= 8, we get

Now, the probability that the male shoe sizes are greater than 8 :-

Hence, the percent of male shoe sizes are greater than 8 is 97.72%.
Answer:
he age of girl 3
years ago is 8.5 years .
Step-by-step explanation:
Given as :
The present age of seventh grader girl = 12 years
Let The age of her 3
years ago = x years
So The age of girl
years ago = x years
<u>Now, According to question</u>
The age of girl 3.5 years ago = 12 - 3.5
Or, The age of girl 3.5 years ago = 8.5 years
Hence The age of girl 3
years ago is 8.5 years . Answer
Answer:
Step-by-step explanation:
√9 and√16
the two numbers are 3 and 4
this means that √10 is located between 3 and 4 ( √10=3.16)
so √10 is 3.16
( unless there are different options , this is the answer)