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LiRa [457]
3 years ago
12

The heights of 500 students at a local school were recorded and found to be approximated by the normal curve below. Which answer

could represent the mean and standard deviation for these data?
a.
69, 6
c.
69, 3
b.
72, 4
d.
60, 3

Please select the best answer from the choices provided
Mathematics
1 answer:
larisa [96]3 years ago
5 0

Answer:

c

Step-by-step explanation:

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Jose earned 29.75 in 3.5 hours how much did he earn in one hour
baherus [9]

Answer:

$8.50

Step-by-step explanation:

$29.75 / 3.5 hours = $8.50 per hour

6 0
2 years ago
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Heyyyyyy lol help (11-4 x 2) ^2
amm1812

Answer:

i got 9

Step-by-step explanation:

3 0
2 years ago
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The radius of the base of a cylinder is increasing at a rate of 7 millimeters per hour. The height of the cylinder is fixed at 1
Ilya [14]

Answer:

The rate of change of the volume of the cylinder at that instant = 791.28\ mm^3/hr

Step-by-step explanation:

Given:

Rate of increase of base of radius of base of cylinder = 7 mm/hr

Height of cylinder = 1.5 mm

Radius at a certain instant = 12 mm

To find rate of change of volume of cylinder at that instant.

Solution:

Let r represent radius of base of cylinder at any instant.

Rate of increase of base of radius of base of cylinder can be given as:

\frac{dr}{dt}=7\ mm/hr

Volume of cylinder is given by:

V=\pi\ r^2h

Finding derivative of the Volume with respect to time.

\frac{dV}{dt}=\pi\ h\ 2r\frac{dr}{dt}

Plugging in the values given:

\frac{dV}{dt}=\pi\ (1.5)\ 2(12)(7)

\frac{dV}{dt}=252\pi

Using \pi=3.14

\frac{dV}{dt}=252(3.14)

\frac{dV}{dt}=791.28\ mm^3/hr (Answer)

Thus rate of change of the volume of the cylinder at that instant = 791.28\ mm^3/hr

6 0
2 years ago
PLEASE HELP, I’m confused. I don’t know how to do this stuff... explain your answer. Thank you!!!!
Maurinko [17]

Answer:

C) y = 2x + 3

Step-by-step explanation: You have to substitute 1 for x & 5 for y & 2 for m, but 1st do the point slope form ---> slope intercept form.

y -Y1 = m(x - X1)

y - 5 = 2(x - 1)

y - 5 = 2x - 2

  +5          + 5

y = 2x + 3 --- IN SLOPE INTERCEPT FORM

Hope this helps you!!! :)



4 0
3 years ago
The las answer is Center E and scale factor 1/4 pleaseee helpp
hoa [83]
<h3>Answer: D) center E, scale factor 1/4</h3>

======================================

Explanation:

Point E is the center of the dilation (we can think of this as the origin point). This is because point E is in the same exact location as point E'. This is a fixed point. The other points move.

To find the scale factor, divide E'F' over EF

scale factor = (E'F')/(EF)

scale factor = 2/8

scale factor = 1/4

Keep in mind that EF = EF'+F'F = 2+6 = 8.

4 0
3 years ago
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