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Diano4ka-milaya [45]
3 years ago
5

HELP!

Mathematics
1 answer:
Marina86 [1]3 years ago
3 0

Answer:

117.3 ft³

Step-by-step explanation:

The equation for the volume of a cone of radius r and height h is

V = (1/3) π r² h.

Here, V = (1/3) π (4 ft)² (7 ft) = 117.3 ft³

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Janette has 386 pennies. 58 nickels and 19 dimes If Janette exchanges her coins for​ dollars, how many dollars will she have? Ho
svet-max [94.6K]

Answer:

$8 ; 66 cents

Step-by-step explanation:

Given that:

Worth of penny, dimes and Nickel in cents and dollars

Nickel, n = 5 cents = $0.05

Dimes, d = 10 cent = $0.1

Penny, p = 1 cent = $0.01

Multiplying the number of each coin with its respective value ;

386(0.01) + 58(0.05) + 19(0.1)

$3.86 + $2.9 + $1.9

= $8.66

Changing it to dollar ,

$8.66 dollars = 8 dollars ;

$0.66 = 66 cents

6 0
3 years ago
The area of a rectangle is 72 cm square. The length of the rectangle is 6 cm longer than the width. What is the width of the rec
miskamm [114]

The correct option will be :  B) 6 cm.

<u><em>Explanation</em></u>

Suppose, the width of the rectangle is x cm.

As, the length is 6 cm longer than the width, so the length will be: (x+6) cm.

<u>Formula for the Area of rectangle</u> is: (Length)*(Width)

Given that, the area of a rectangle is 72 cm²

So....

x(x+6)=72\\ \\ x^2+6x-72=0\\ \\ (x+12)(x-6)=0

Using zero-product property, we will get...

x+12=0\\ x= -12 <em>(Negative value is ignored as width can't be negative)</em>

and

x-6=0\\ x=6

So, the width of the rectangle is 6 cm.

6 0
3 years ago
If a population of 300 cells doubles every hour, which function represents the population after (h) hours
tangare [24]
I say y=300(2x) X=hours Y=population
Y=600x
8 0
2 years ago
Tell whether it is possible to draw a triangle with the given side lengths. 4 cm, 4 cm, 7 cm
Sati [7]
Yes it is because 4+4=8 and 8 is larger than 7
5 0
2 years ago
Read 2 more answers
Maths question trigonometry help pleassssee
r-ruslan [8.4K]

Answer:

x=4.5

Step-by-step explanation:

Using sohcahtoa we know tangent is equal to (length of side opposite to the angle ) / (lenth of side adjacent to the angle)

therefore: tan (theta) = (x-3) / (x) = 1 / 3

now cross multiply

3(x-3) = x

now solve for x

3x - 9 = x

-9= -2x

x= 4.5

7 0
2 years ago
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