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kipiarov [429]
3 years ago
9

The cost to mail a package is $7 for the first 2 pounds and 30 cents for each additional ounce. Which of the following functions

represents the cost to mail a package if x is the number of ounces over 2 pounds?
Answers:
a) f(x) = 7 + 0.3x
b) f(x) = 14 + 0.3x
c) f(x) = 0.3(x + 2)
Mathematics
1 answer:
SOVA2 [1]3 years ago
5 0
A. f(x) = 7 + 0.3x

Just re-read your question! Hope I helped!
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Which angle in ABC is the longest
crimeas [40]
Between A and B = 12 is A.
7 0
2 years ago
HELP ASAP<br> What is the solution to the system of equations?<br> y = x + 3<br><br> y = -x-1
ASHA 777 [7]

Answer:

(A) Is right

Step-by-step explanation:

y = x + 3 \\ y =  - x - 1 \\ substitute \: y =  - x - 1 \: in \: above \: eq \\ weget \\  - x - 1 =  x + 3 \\ 2x =  - 4\\ x =  - 2 \\  \\

put X= -2. in y = X+3

to get y 's value

Y = -2+3

= 1

therefore, your solution is ( -2,1)

5 0
3 years ago
Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 3 cubic feet
gtnhenbr [62]

Answer:

Therefore the height of the water in the pool changes at the rate of \frac{1}{3\pi} feet per minute.

Step-by-step explanation:

Given that  the shape of swimming pool is right circular cylinder.

The  rate of water pouring in the pool = 3 cubic feet per minute.

It means the rate of change of volume is 3 cubic feet per minute.

\frac{dv}{dt}=3 cubic feet per minute.

When the volume of the swimming pool changed it means the height of the water level of the pool change and the radius of the swimming pool remains constant.

Let the height of the pool be h.

The volume of the pool is = \pi 3^2 h  cubic feet

                                          =9\pi h cubic feet

Therefore,

v =9\pi h

Differentiating with respect to t

\frac{dv}{dt}= 9\pi \frac{dh}{dt}

Putting \frac{dv}{dt}=3

3=9\pi \frac{dh}{dt}

\Rightarrow \frac{dh}{dt} =\frac{3}{9\pi}

\Rightarrow \frac{dh}{dt} =\frac{1}{3\pi}

The change of height of the pool does not depend on the depth of the pool.

Therefore the rate of change of height of the water in the pool is \frac{1}{3\pi} feet per minute.

6 0
2 years ago
Plz HELP PLZ HELP.The design for a new cardboard display is shown below. The designers want to determine how much cardboard they
sineoko [7]

9514 1404 393

Answer:

  62 1/2 square feet

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The total area is the area of the central square plus the area of the four triangles.

The area formula for a square is ...

  A = s² . . . . for side length s

The area formula for a triangle is ...

  A = 1/2bh . . . . for base b and height h

Here, we have a square with side lengths of 5 m, and triangles with a base of 5 m and a height of 3 3/4 m. Then the area of the square plus the area of 4 triangles is ...

  A = (5 ft)² + 4×(1/2)(5 ft)(3 3/4 ft) = 25 ft² +37 1/2 ft²

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62.5 square feet of cardboard will be needed to build the display.

6 0
3 years ago
Help a brother out. Math
Troyanec [42]

Answer:

bet ay yo it's D. 3,630 cubic meters

7 0
2 years ago
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