All categories

3 years ago

Mary earns $14 per hour. Which equation represents how many hours she worked to earn $112

Mathematics

2 answers:

Makovka662 [10]3 years ago

5 0

8 is the correct question

tensa zangetsu [6.8K]3 years ago

3 0

Answer:

Here's the equation: 112/14 = 8

You might be interested in

A circular Park of radius 30m has a track of width 2.5m on its innet side.find the area of the track.

BabaBlast [244]

This is a pretty mathematical question, so I will answer it in pieces as I get the time to work it out. To find the time it takes to fall, you start with Newton's second law, ma=m[d2r/dt2]=-GMm/r2=dv/dt and integrate it once to get v=dr/dt=√[2GM(R-r)/(Rr)] where, for your question, R is the distance from the center of the earth to the point from which it was dropped, r is where it is at the time t(r), G is the universal gravitation constant, and M is the mass of the earth. (The mass m of the ship does not matter.) (You can more easily get v(r) from energy conservation.) Next integrate v(r)=dr/dt to get t(r)=-2.69x105{0.5tan-1((2x-1)/(2√[x(1-x)]-√[x(1-x)]-π/4} where x=r/R; this is not a simple integral to perform, but you can find good integrators on the web, for example Wolfram Alpha. Once you have gotten the indefinite integral you are not finished, you need to find the integration constant which will put the ship at rest at x=r/R=1; that is where the π/4 comes from. Putting in your numbers, I find t=4.22x105 s=117 hr=4.89 days. The figure shows the graph of t(x).

7 0

3 years ago

Read 2 more answers

Find the equation of the line ALGEBRAICALLY that is perpendicular to the line 5x - 8y + 24 = 0 and

andre [41]

Answer:

Step-by-step explanation:

There are several things we need to do/know to figure this out. First we have to know that the perpendicular slope to a line is the opposite reciprocal of the slope of which it is perpendicular (did that make sense?!). In other words, we have to find the slope of the line 5x - 8y + 24 = 0 and then take the opposite reciprocal of it. Solving for y:

$y=\frac{5}{8}x+3$ with a slope of 5/8. The perpendicular slope, then, is -8/5. So we have m now in y = mx + b. Now onto the second equation...

The equation for which we need the same x-intercept is 7x - 12y - 70 = 0. The x-intercept exists when y = 0, so filling in a 0 for y:

7x - 12(0) = 70 and

x = 10. Now we know x. We also know, however, that when x = 10, y = 0, so we have everything we need to sub into the linear equation and solve for b:

0 = -8/5(10) + b and

0 = -16 + b so

b = 16 and the equation we are looking for is

y = -8/5x + 16

6 0

3 years ago

Need help with this please

KonstantinChe [14]

Answer:

72 cent

Step-by-step explanation:

7 0

3 years ago

GIVING OUT BRAINLIEST ANSWERR HELP ME QUICK PLLSSSSS ITS ALMOST DUE HELPP !!!

ELEN [110]

Answer:

90°

Step-by-step explanation:

Thales Theorem

6 0

3 years ago

Multiply (2.3 × 10–5)(3.1 × 1012) A. 7.13 × 107 B. 7.13 × 10–60 C. 5.4 × 107 D. 5.4 × 108

lys-0071 [83]

ANSWER

A.
$7.13 \times {10}^{ 7}$

EXPLANATION

The expression given to us is,

$(2.3 \times {10}^{ - 5} )(3.1 \times {10}^{12} )$

We have to do the multiplication in standard form

$(2.3 \times {10}^{ - 5} )(3.1 \times {10}^{12} ) = 2.3 \times 3.1 \times {10}^{ - 5} \times {10}^{12}$

We now multiply the first two numbers and simplify the last two index numbers using the laws of exponents to obtain,

$(2.3 \times {10}^{ - 5} )(3.1 \times {10}^{12} ) = 7.13 \times {10}^{ - 5 + 12}$

We simplify to get,

$(2.3 \times {10}^{ - 5} )(3.1 \times {10}^{12} ) = 7.13 \times {10}^{ 7}$

Therefore the correct answer is A.

4 0

3 years ago

Read 2 more answers