21. The heights of three-year-old boys are Normally distributed with a mean of 96 cm. and a standard deviation of 4.5 cm. The next five questions concern this distribution. What percentage of three-year-old boys are over 100 cm. tall? (a) 1.4%
(b) 18.7%
(c) 40.1%
(d) 41.3%
(e) 81.3%
22. The heights of three-year-old boys are Normally distributed with a mean of 96 cm. and a standard deviation of 4.5 cm. What percentage of boys are between 95 and 100 cm. tall?
(a) 1.4%
(b) 18.7%
(c) 40.1%
(d) 41.3%
(e) 81.3%
25. The heights of three-year-old boys are Normally distributed with a mean of 96 cm. and a standard deviation of 4.5 cm. What is the standard score for a three-year-old boy who is 99.5 cm tall?
(a) –1.29
(b) –0.67
(c) 0.67
(d) 0.78
(e) 1.29

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!

a box 3 3/4 feet long or 4+ feet.

step-by-step explanation:

true !

step-by-step explanation: