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icang [17]
3 years ago
5

A certain alloy contains 5.25% copper. How much copper is there in a piece weighing 200 pounds?

Mathematics
2 answers:
Rasek [7]3 years ago
5 0
D that one was easy just ask for any other help


dalvyx [7]3 years ago
4 0
I'm sure the answer is d

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What is 135% as a fraction in simplest form
crimeas [40]
Fraction to decimal = move the decimal two spaces to the left. 1.35 = 1 35/100 35 is over a 100, because the decimal end on the hundredth place. 1 35/100 simplifies to 1 7/20 135% = 1 7/20
4 0
3 years ago
Read 2 more answers
A football is kicked toward an end zone with an initial vertical velocity of 30 ft/s. The function h(t) = -16+ 30t models the he
Ulleksa [173]

Answer:

A. The football does not reach a height of 15ft

Step-by-step explanation:

Given

h(t) = -16t^2 + 30t

Required

Determine which of the options is true

The option illustrates the height reached by the ball.

To solve this, we make use of maximum of a function

For a function f(x)

Such that:

f(x) = ax^2 + bx + c:

f(\frac{-b}{2a}) = maximum/minimum

i.e we first solve for \frac{-b}{2a}

Then substitute \frac{-b}{2a} for x in f(x) = ax^2 + bx + c

In our case:

First we need to solve \frac{-b}{2a}

Then substitute \frac{-b}{2a} for t in h(t) = -16t^2 + 30t

By comparison:

b = 30

c = -16

\frac{-b}{2a} = \frac{-30}{2 * -16}

\frac{-b}{2a} = \frac{-30}{-32}

\frac{-b}{2a} = \frac{30}{32}

\frac{-b}{2a} = \frac{15}{16}

Substitute \frac{15}{16} for t in h(t) = -16t^2 + 30t

h(\frac{15}{16}) = -16(\frac{15}{16})^2 + 30(\frac{15}{16})

h(\frac{15}{16}) = -16(\frac{225}{256}) + \frac{450}{16}

h(\frac{15}{16}) = -(\frac{225}{16}) + \frac{450}{16}

h(\frac{15}{16}) = \frac{-225 + 450}{16}

h(\frac{15}{16}) = \frac{225}{16}

h(\frac{15}{16}) = 14.0625

This implies that the maximum height reached is 14.0625ft.

So, the option that answers the question is A because 14.0625 < 15

8 0
3 years ago
Edmund makes a cube using eight small cubes.
anyanavicka [17]

Answer: 184

Step-by-step explanation:

so edmund would have a 2 by 2 cube (try and draw it out if that helps) so

2 x 2 = 4

2 x 3 = 6

2 x 4 = 8

so samuel cubeboid would be

long = 4

wide = 6

hight = 8

8 x 6 x 4 = 192 small cubes

but we are trying to find how much more samuel got

so 192 - 8 = 184

8 0
3 years ago
A regular hexagon is rotated 360° about its center. How many times does the image of the hexagon coincide with the pre image dur
lianna [129]

The image of the regular hexagon coincides with the pre-image 6 times during rotation.

A regular hexagon is a polygon that has six equal sides and six equal angles.

In a single rotation which is usually the rotation of an object at 360°, the number of times in which the regular hexagon coincides with its pre-image is 6 times, this is because it has 6 equal sides and 6 equal angles.

Learn more about regular polygon here:

brainly.com/question/1592456

8 0
3 years ago
39 is 5% of what number
hjlf
To find this out:
Turn the percent into a fraction and cross multiply!

5%=5/100

5 39
_ × ____
100


Multiply 39 × 100 (3,900)
Then divide by 5!
3900/5=780

39 is 5% of 780!
4 0
3 years ago
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