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2 years ago

Pls help me out!!!!!!!

Mathematics

1 answer:

taurus [48]2 years ago

8 0

Answer:

${4}^{4}\times {4}^{3} \div {4}^{5} = {4}^{4 + 3 - 5} = \\ {4}^{2}$

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1. A 5 kg box is lifted from the floor to a height of 1.5 m. How much work was done in this proces

iren [92.7K]

Answer:

Work done = 73.575 J

Step-by-step explanation:

Given,

Mass (m) = 5 kg

Height (h) = 1.5 m

Gravity (g) = 9.81 m/s²

Work done = ?

Work done

= mgh

= 5 kg × 9.81 m/s² × 1.5 m

= 73.575 joule (J)

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4 0

1 year ago

Read 2 more answers

Factorise x^2+4x+3<br> Write your steps as well please

vampirchik [111]

Step-by-step explanation:

x²+4+3
x²+x+3x+3
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<h2>stay safe healthy and happy...</h2>

7 0

2 years ago

Divide 2 1/2 divided by 1/5 in simplest form

Strike441 [17]

Answer:

Step-by-step explanation:

first u take 2 1/2 and change it into a improper fraction.

so 2 X 2 = 4 then + 1

5/2 divide by 1/4

which is 10

3 0

2 years ago

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Consider a normal distribution curve where the middle 85 % of the area under the curve lies above the interval ( 8 , 14 ). Use t

NeTakaya

Answer:

$\mu = 11$

$\sigma = 2.08$

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Middle 85%.

Values of X when Z has a pvalue of 0.5 - 0.85/2 = 0.075 to 0.5 + 0.85/2 = 0.925

Above the interval (8,14)

This means that when Z has a pvalue of 0.075, X = 8. So when $Z = -1.44, X = 8$ . So