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gizmo_the_mogwai [7]

3 years ago

8

Katie worked on her science fair project for 2.5 hours on Tuesday and 1.75 hours on Friday. How many hours did she work on the p

roject Tuesday and Friday combined? Show your work.

1 answer:

Natali5045456 [20]3 years ago

6 0

Answer:

4.25 hrs.

Step-by-step explanation:

2.5

+ 1.75

---------

4.25

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Answer question worth 25 points plz help!

Ilya [14]

Answer:

B

Step-by-step explanation:

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3 years ago

The given line passes through the points (0, −3) and (2, 3).

Fed [463]

If the 2 lines are parallel, their slopes are the same.

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3 years ago

What is the LCM of 55,121 and 132

serg [7]

132/2 = 66
66/2 = 33
33/3 = 11
11/11 = 1

132 = 2^2 * 3 * 11

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4 years ago

How do you convert 5/33 into a decimal?

sukhopar [10]

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Step-by-step explanation:

3 0

3 years ago

A recent survey found that 7575% of all adults over 50 wear glasses for driving. In a random sample of 4040 adults over 50, wh

malfutka [58]

Answer:

Mean = 30

standard Deviation = 2.74

Step-by-step explanation:

Formula

mean = np

Standard Deviation = $\sqrt{npq}$

from the question = 40

P = 75% or 0.75

q = 1 - p = 1 - 75% or 1 - 0.75

To find mean

mean = 40 x 0.75

= 30

For Standard Deviation (SD)

Standard Deviation = $\sqrt{npq}$

= $\sqrt{40 X 0.75 X 0.25$

= $\sqrt{7.5}$

:. Standard Deviation = 2.74

5 0

3 years ago