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2 years ago

A runner ran 25 miles last week and 15 miles this week. What is the percent of change

Mathematics

2 answers:

Ede4ka [16]2 years ago

8 0

Answer:

40%

Step-by-step explanation:

The change in percent is the difference of the two distances ran divided by the last week’s distance and the result multiplied by 100%

That’s

25 - 15 / 25 x 100%

10/25 x 100%

0.4 x 100%

40%

The percentage change 40%

nikdorinn [45]2 years ago

4 0

Answer:

21.25 or 28.75

Step-by-step explanation:

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Simplify 5 to the power of negative 2 over 4 to the power of 6?

Naya [18.7K]

Answer:

Step-by-step explanation:

$\frac{5^{-2} }{4^{6} } =\frac{1}{5^{2} 4^{6} }$

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3 years ago

The radius of a cylinder gift box is box is 3X +1 inches the height of the gift box is twice the radius what is the surface area

Genrish500 [490]

Answer:

The surface area of the gift box is = $A = \frac{1188}{7}x^{2}+ \frac{774}{7}x +\frac{132}{7}$

Step-by-step explanation:

The surface area of the cylinder can be calculated using this formula:

$A=2\pi rh+2\pi r^2$

in this case, r is not a number, but rather an expression, which is r = $3x +1$ .

The height of the gift box is twice the radius, which is h = $2(3x+1)= 6x+2$

To get our curved surface area, we carefully put the expressions for h and r into the equation.

$A = 2 \times \frac{22}{7} \times (3x+1) \times (6x+2) + 2 \times \frac{22}{7} \times (3x+1)^{2}$

$A = \frac{44}{7} (3x+1) \times (6x +2) + \frac{44}{7} (9x^{2} + 6x +1)\\A =\frac{132}{7}x + \frac{44}{7} \times (6x+2)+ \frac{396}{7}x^{2}+\frac{246}{7}x +\frac{44}{7}$

$A = \frac{792}{7}x^{2} +\frac{264}{7}x +\frac{264}{7}x + \frac{88}{7} + \frac{396}{7}x^{2} + \frac{246}{7}x + \frac{44}{7}$

$A = \frac{1188}{7}x^{2}+ \frac{774}{7}x +\frac{132}{7}$

The surface area of the gift box is = $A = \frac{1188}{7}x^{2}+ \frac{774}{7}x +\frac{132}{7}$

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3 years ago

A car travels 320 miles in 8 hours what is the unit rate in miles per hour

dangina [55]

The correct answer is 40 miles per hour.

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3 years ago

Which equation is written in slope-intercept form? y=3x-2 x=1/2y+8 2x+5y=12 3y=8x-5

Triss [41]

Answer:

y=3x-2

Step-by-step explanation:

Because the equation for slope intercept form is y=mx+b!

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3 years ago

Read 2 more answers

"if calvin buys 4 pounds of starfruit and 3 pounds of oranges, how much is his total utility"

mel-nik [20]

He would have bought 7 pound
This is because you would add 4 and 3 together

Hope this helps!

8 0

3 years ago