Anormal distribution of data has a mean of 15 and a standard deviation of 4. how many standard deviations from the mean is 25? 0.16 0.4 2.5 6.25

Third option is correct.

Step-by-step explanation:

Since we have given that

Mean

Standard deviation

Mean (X) = 25

We need to find the "Number of standard deviations (Z) from the mean (X) ":

As we know that in Normal distribution:

Hence, Third option is correct.

(a) common ratio in the given sequence is, 3

(b) push ups will do kendall do on the 20th week

step-by-step explanation:

geometric sequence is a sequence of numbers that follows a pattern were the next term is found by multiplying by a constant called the common ratio(r)

(a)

given the sequence: 6 , 18 , 54 , 162 ,

this sequence is geometric sequence where each term is 3 times the previous term.

therefore,

common ratio(r) = 3.

(b)

a formula for nth term of geometric sequence is given by;

,   where r is the common ratio between the successive terms and is the first term,

to find how many push ups will kendall do on the 20th week.

here. n = 20th term.

in the given sequence first term

then;

simplify:

therefore, push ups will do kendall do on the 20th week