Step-by-step explanation: You use normalcdf to find the area under a curve. The lower bound (in this case 7) goes first followed by the upper bound, mean, and standard deviation.

8 0

2 years ago

An identity thief watches someone enter a 4-digit PIN and manages to see the first two digits. If the thief tries guessing the P

DENIUS [597]

Think of it this way: your friend is thinking of a year, and you have to guess which. She has told you the year is in the 20th century (1900s).
There are 100 years in the 20th century (1901-1999 plus 1900).
There can be 100 possibilities

7 0

3 years ago

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Find the new amount given the original amount and the percent of change. 28 members; 50% decrease​

Find the new amount given the original amount and the percent of change. 28 members; 50% decrease