Mathematics, 12.01.2020 11:31 lex2678
Phone numbers consist of a three-digit area code followed by seven digits. if the area code must have a 0 or 1 for the second
digit, and neither the area code nor the seven-digit number can start with 0 or 1, how many different phone numbers are
possible? how did you come up with your answer?
a 8-10-10-8-10-10-10 10 10 10 = 6,400,000,000
b. 8-2-10-8-10 10 10 10 10 10 = 1,280,000,000
c. 8-2-10-8-10-10-10 10 10 - 128,000,000
d. 8-2-10-8-10-10-10 10 10 10 - 10 = 12,800,000,000
select the best answer from the choices provided
0 a
ob
oc
od
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nextlm
Answers: 2
Mathematics, 21.06.2019 20:50
An object is translated by (x + 4, y - 2). if one point in the image has the coordinates (5, -3), what would be the coordinates of its pre-image? (9, -5) (1, -5) (9, -1) (1, -1)
Answers: 1
Mathematics, 21.06.2019 21:30
Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?
Answers: 1
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