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Elena-2011 [213]

3 years ago

15

a contractor digs a hole that is 40 ft long and 10.5 feet deep. what is the width of the hole if 6,510 cubic feet of dirt is rem

oved?

1 answer:

ehidna [41]3 years ago

8 0

Jtdutcyiftutfutffgucug

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What is the value of x?

malfutka [58]

Answer:there is no Val to x except I you use it as an variable

Step-by-step explanation:

Do the same steps that you would use for any other problem

7 0

4 years ago

Someone please help me state all the possible names for the figure

Otrada [13]

Answer:

B.

Step-by-step explanation:

To answer, lets look at the definitions of each name.

First, a quadrilateral. A quadrilateral is a polygon in Euclidean plane geometry with four edges and four vertices, so it basically just has 4 sides, which this figure has, so this figure is a quadrilateral.

Next, a parallelogram. A parallelogram is a four-sided plane rectilinear figure with opposite sides parallel. So as long as a figure has 4 sides and at least 2 opposite sides that will never collide, it is a parallelogram. Because our figure has 4 sides and each pair of opposite sides is parallel, this figure is a parallelogram.

Last, a rectangle. A rectangle is a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square. So, as long as there are 4 sides and 4 right angles, and 2 of the opposite sides are longer than the other set of opposite sides, it is a rectangle, and this figure fills all the requirements.

So, since the figure is a quadrilateral, a parallelogram, and a rectangle, the answer is B.

Hope this helps :)

3 0

3 years ago

Domain, range, symmetry and asymptotes of f(x)=sec2x

timofeeve [1]

If every 2 sec = x that well mean that symmetry and asympotes well go together .

4 0

4 years ago

Sara borrowed $5,000 from her father at a simple interest rate of 12.5% per year. Over a two - year period, she made equal month

Olin [163]

The formula for simple interest is:

A = P(1+rt)

Where P = amount borrowed

r = interest rate

t = time of loan

A = 5000(1 + 0.125*2)

A =6,250

The total amount she paid back was $6,250

For her monthly payment divide total paid back by 24 months ( 2 years = 24 months)

6250 / 24 = 260.42

Her monthly payment was $260.42

8 0

3 years ago

Read 2 more answers

The diameters of a batch of ball bearings are known to follow a normal distribution with a mean 4.0 in and a standard deviation

8_murik_8 [283]

Answer:

a) 88.54% probability of a diameter between 3.8 in and 4.3 in

b) 25.14% probability of a diameter smaller than 3.9in

c) 90.82% probability of a diameter larger than 4.2 in

Step-by-step explanation:

Problems of normally distributed samples can be 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.

In this problem, we have that:

$\mu = 4, \sigma = 0.15$

(a) a diameter between 3.8 in and 4.3 in,

This is the pvalue of Z when X = 4.3 subtracted by the pvalue of Z when X = 3.8.

X = 4.3

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

$Z = \frac{4.3 - 4}{0.15}$

$Z = 2$

$Z = 2$ has a pvalue of 0.9772

X = 3.8

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

$Z = \frac{3.8 - 4}{0.15}$

$Z = -1.33$

$Z = -1.33$ has a pvalue of 0.0918

0.9772 - 0.0918 = 0.8854

88.54% probability of a diameter between 3.8 in and 4.3 in

(b) a diameter smaller than 3 9 in,

This is the pvalue of Z when X = 3.9. So

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

$Z = \frac{3.9 - 4}{0.15}$

$Z = -0.67$

$Z = -0.67$ has a pvalue of 0.2514

25.14% probability of a diameter smaller than 3.9in

(c) a diameter larger than 4.2 in

This is 1 subtracted by the pvalue of Z when X = 4.2. So

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

$Z = \frac{4.2 - 4}{0.15}$

$Z = 1.33$

$Z = 1.33$ has a pvalue of 0.9082

90.82% probability of a diameter larger than 4.2 in

6 0

3 years ago