Mario simplified the expression (4 z Superscript 8 Baseline) Superscript negative 3 as shown. (4 z Superscript 8 Baseline) Superscript negative 3 = 4 z Superscript 8 times (negative 3) Baseline = 4 z Superscript negative 24 Baseline = StartFraction 4 Over z Superscript 24 Baseline EndFraction

Which statement explains Mario’s error?
A. He should have added the exponents instead of multiplying them.
B. He should have subtracted the exponents instead of multiplying them.
C. He should have applied the exponent –3 to 4, and not to z, to get 4 Superscript negative 3 Baseline z Superscript 8 Baseline = 4 Superscript negative 3 Baseline z Superscript 8 Baseline = StartFraction z Superscript 8 Baseline Over 64 EndFraction.
D. He should also have applied the exponent –3 to 4 to get 4 Superscript negative 3 Baseline z Superscript 8 Baseline times (negative 3) Baseline = 4 Superscript negative 4 Baseline z Superscript negative 24 Baseline = StartFraction 1 Over 64 z Superscript 24 EndFraction.

Ined this is due tomorrow and i dont know the answer can you find all the exponents

An annual marathon covers a route that has a distance of approximately 26 miles. winning times for this marathon are all over 2 hours. the following data are the minutes over 2 hours for the winning male runners over two periods of 20 years each. earlier period 14 12 15 22 13 10 19 13 9 14 20 18 16 20 23 12 18 17 6 13 recent period 7 11 7 14 8 9 11 14 8 7 9 8 7 9 9 9 9 8 10 8 (a) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the earlier period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks. for more details, view how to split a stem.) minutes beyond 2 hours earlier period 0 1 2 (b) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the recent period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks.) minutes beyond 2 hours recent period (c) compare the two distributions. how many times under 15 minutes are in each distribution

Mr. walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?