Can someone help me with this. Will Mark brainliest . Need answer and work/explanation. Thank you.

Mathematics

1 answer:

Rom4ik [11]3 years ago

5 0

Answer:

Hope it helps...

Step-by-step explanation:

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Describe how you would estimate the first number of the quotion for the division497÷22

liraira [26]

I would round them so it would be 500 divided by 20
The answer should be close to 25

4 0

3 years ago

A wooden board 100 centimeters long is cut into two pieces. One piece is 16 centimeters longer than the other. What are the leng

Bezzdna [24]

x = the length of one piece

y = the length of the other piece

the total length is 100 cm this means

x + y = 100

one piece is 16 inches longer than the other

first we need to convert inches to cm:

1 in = 2.54 cm

16 in = 2.54*16 = 40.64

now we can write

x = y + 40.64

by solving the system of equations

x + y = 100

x = y + 40.64

we find

x = 70.32 cm

y = 29.68 cm

the lengths of the two pieces are 70.32 cm and 29.68 cm.

4 0

3 years ago

SAT scores (out of 1600) are distributed normally with a mean of 1100 and a standard deviation of 200. Suppose a school council

fgiga [73]

Answer:

0.91517

Step-by-step explanation:

Given that SAT scores (out of 1600) are distributed normally with a mean of 1100 and a standard deviation of 200. Suppose a school council awards a certificate of excellence to all students who score at least 1350 on the SAT, and suppose we pick one of the recognized students at random.

Let A - the event passing in SAT with atleast 1500

B - getting award i.e getting atleast 1350

Required probability = P(B/A)

= P(X>1500)/P(X>1350)

X is N (1100, 200)

Corresponding Z score = $\frac{x-1100}{200}$