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3 years ago

12

HELP ME PLZ ASAP it is about cylinders and stuff I kinda understand but also I don't just learn today so...yeah, so showing work

will be amazing too, you don't have to but it would be great if you did. thank you :)

2 answers:

Luba_88 [7]3 years ago

6 0

Answer:

The second one 355 in.2 Is the closest one right

Kryger [21]3 years ago

6 0

The answer is b hope this help

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297 rotary rigs were active in 2007

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3 years ago

Suppose that 5 J of work is needed to stretch a spring from its natural length of 30 cm to a length of 39 cm.

vesna_86 [32]

Answer

given,

work = 5 J

spring stretch form 30 cm to 39 cm

$W = \dfrac{1}{2}kx^2$

x = 0.39 - 0.30 = 0.09 m

$5 = \dfrac{1}{2}k\times 0.09^2$

$k = \dfrac{5\times 2}{0.09^2}$

k = 1234.568 N/m

a) work when spring is stretched from 32 cm to 34 cm

x₂= 0.34 -0.30 = 0.04 m

x₁ = 0.32 - 0.30 = 0.02

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W = 0.741 J

b) F = k x

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x = 0.0205 m

x = 2.05 cm

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3 years ago

What is the volume of a cone with a height of 27 cm and a radius of 13cm

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Answer:

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3 years ago

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Problem solving with inequalities

anzhelika [568]

Option D:

15c ≤ 200

Solution:

Let c be the number of cases of tea bags.

Cost of each tea bag = 15 gold coins

Total gold coins Mad have = 200

<u>Set up an inequality:</u>

Cost of c tea bags = 15 × c = 15c

Mad can buy tea bags at most 200 gold coins.

(At most 200 means 200 is the greater value)

15 × c ≤ 200

15c ≤ 200

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3 years ago

In the 2014 - 2015 school year, the mean score on the critical reading of the SAT was 490 with a standard deviation of 102 for j

bonufazy [111]

<u>Answer:</u>

The Ranking Percentile is (B) 97.5%

<u>Explanation :</u>

To find the percentile rank we need to find the z- score. After finding the z-score match this value with the corresponding value in z-score table.

Formula to find the z-score

Z-score= $\frac{\text { scored obtained - mean }(\mu)}{\text { standard deviation }(\sigma)}$

Substituting the values in the above equation, we find

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So, the Z-score is +2

Now, the corresponding value of Z-score 2 in the table is 0.9772

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3 years ago