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3 years ago

Think I know but need some help. can an expert help

Mathematics

1 answer:

xeze [42]3 years ago

4 0

$69.64 I THINK IS HOW MUCH SHE WILL HAVE TO PAY.

HOPE THIS HELPS

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Jose can read 7 pages of his book in 5 minutes. At this rate, how long will it take him to read the entire 175 page book?

il63 [147K]

125 minutes, or 2 hours and 5 minutes.

$\frac{5}7 = \frac{x}{175}$
cross multiply
5*175=7x
875=7x
$\frac{875}7=x$
125=x

5 0

4 years ago

Read 2 more answers

Is 4.65 rounded to the nearest tenth 4.6 or 4.7?

Lerok [7]

it is 4.7 because anything using 5 to round automatically bumps the number before up

8 0

3 years ago

Which is the inverse of the following statement?

sergiy2304 [10]

Yes if it’s less than 90 it’s an acute but yes 90 is a right angle

4 0

3 years ago

The dimensions of a closed rectangular box are measured as 97 cm, 67 cm, and 34 cm, respectively, with a possible error of 0.2 c

Dahasolnce [82]

Answer:

The maximum error in calculating the surface area of the box is $158.4 \:cm^2$ .

Step-by-step explanation:

Differentials are infinitely small quantities. Given a function $y=f(x)$ we call $dy$ and $dx$ differentials and the relationship between them is given by,

$dy=f'(x) \:dx$

If the dimensions of the box are $l$ , $w$ and $h$ , its surface area is $A=2(wl+hl+hw)$ and

$dA=\frac{\partial A}{\partial l}dl+\frac{\partial A}{\partial w}dw+\frac{\partial A}{\partial h}dh\\\\dA=2(w+h)dl+2(h+l)dw+2(w+l)dh$

To find the largest error in the surface area, we therefore use $dl=0.2, dw=0.2, dh=0.2$ together with $l=97, w=67,h=34$

$dA=2(w+h)dl+2(h+l)dw+2(w+l)dh\\\\dA=2(67+34)\cdot 0.2+2(34+97)\cdot 0.2+2(67+97)\cdot 0.2\\\\dA=158.4 \:cm^2$

An error of 0.2 cm in each dimension could lead to an error of $158.4 \:cm^2$ in the calculated surface area.

3 0

3 years ago

Use the data in the following table, which summarizes results from 179 pedestrian deaths that were caused by accidents. If two d

sergey [27]

Total pedestrian deaths = 179

Total number of deaths that involved intoxicated driver = 96 + 40 = 136

Two accidents are randomly selected without replacement, thus;

Probability = desired outcome / total number of outcome

<span>Probability = (136/179) x (135/178) = 0.7597x0.7584 = 0.5761</span>

3 0

4 years ago