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Anettt [7]
3 years ago
14

PLS HELP I DONT UNDERSTAND THIS

Mathematics
2 answers:
Doss [256]3 years ago
6 0

Answer:

27.1 inches

Step-by-step explanation:

Volume of a cone = ⅓ × pi × r² × h

48 = ⅓ × 3.14 × 1.3² × h

h = (48 × 3)/(3.4 × 1.3²)

h = 27.1360193 inches

kumpel [21]3 years ago
4 0

Answer:

27.1 inches

Step-by-step explanation:

The volume of a cone is denoted by: V=\frac{1}{3} \pi r^2h, where r is the radius and h is the height.

Here, we're already given that the volume is 48, so V = 48, and that the radius is 1.3, so r = 1.3. Plug these in:

V=\frac{1}{3} \pi r^2h

48=\frac{1}{3} \pi *1.3^2h

Now, solve for h by dividing both sides by (\frac{1}{3} \pi *1.3^2):

h = 48 ÷ (\frac{1}{3} \pi *1.3^2) ≈ 27.1 inches

Hope this helps!

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What is the value of StartFraction negative 8 (17 minus 12) over Negative 2 (8 minus (negative 2)) EndFraction?
Ahat [919]

Answer:

2

Step-by-step explanation:

\frac{-8(17-12)}{-2(8-(-2))} \\=\frac{-8(5)}{-2(8+2)} \\=\frac{-40}{-2(10)} \\=\frac{-40}{-20} \\=2

6 0
3 years ago
Find all real numbers t such that (2/3)t - 1 < t + 7 ≤ -2t + 15. Give your answer as an interval.
Andrews [41]
Break up chain with AND statement:

(2/3)t - 1 < t + 7 AND <span>t + 7 ≤ -2t + 15

left side, we solve for t
</span>
<span>(2/3)t - 1 < t + 7
(2/3)t - t < 7 + 1
(-1/3)t < 8
t > -24

right side, we solve for t</span>
<span>t + 7 ≤ -2t + 15
t + 2t </span><span>≤ 15 - 7
3t </span><span>≤ 8
t </span><span>≤ 8/3

So our answer would be </span>
t > -24 AND t <span>≤ 8/3

as an interval, this is
</span>-24 < t <span>≤ 8/3
or in interval notation
(-24, 8/3]</span>
8 0
4 years ago
A group of 12 adults and 26 children go to a theme park.
tatyana61 [14]

Answer:

45.56923076923077

Step-by-step explanation:

Work out 51.6 x 12 which is 619.2 and subtract that from 1804.80 then x your answer which is 1,184.8 and divide by 26 to get your answer which is 45.569....

3 0
3 years ago
PLEASE HELP a three dight number has one more ten than it has hundreds, and it also has one more than twice as many units as ten
bija089 [108]

The reverse number of the three-digit number is 732

<h3>How to determine the reverse of the number?</h3>

Let the three-digit number be xyz.

So, the reverse is zyx

This means that

Number = 100x + 10y + z

Reverse = 100z + 10y + x


From the question, we have the following parameters:

y = x + 1

z = 1 + 2y

The sum is represented as:

100x + 10y + z + 100z + 10y + x = 10^3 - 31

100x + 10y + z + 100z + 10y + x = 969

Evaluate the like terms

101x + 101z + 20y = 969

Substitute y = x + 1

101x + 101z + 20(x + 1) = 969

101x + 101z + 20x + 20 = 969

Evaluate the like terms

101x + 101z + 20x = 949

121x + 101z = 949

Substitute y = x + 1 in z = 1 + 2y

z = 1 + 2(x + 1)

This gives

z = 2x + 3

So, we have:

121x + 101z = 949

121x + 101* (2x + 3) = 949

This gives

121x + 202x + 303 = 949

Evaluate the sum

323x = 646

Divide by 323

x = 2

Substitute x = 2 in z = 2x + 3 and y = x + 1

z = 2*2 + 3 = 7

y = 2 + 1 = 3

So, we have

x = 2

y = 3

z = 7

Recall that

Reverse = 100z + 10y + x

This gives

Reverse = 100*7 + 10*3 + 2

Evaluate

Reverse = 732

Hence, the reverse number of the three-digit number is 732

Read more about digits at:

brainly.com/question/731916

#SPJ1

8 0
1 year ago
Find the quotient of -1 4/5 and 3 1/4
abruzzese [7]
The quotient of -1 4/5 and 3 1/4 = (<span>-1 4/5) / ( 3 1/4)

= [ - (5 * 1 + 4) / 5 ] / [ (3 * 4 + 1) / 4 ]

= [ -9 / 5 ] / [ 13 / 4 ]

= [ -9 / 5 ] * [ 4 / 13 ]

= [ -9 * 4 ] / [ 5 * 13 ]

= -36/65




another way is to do it separately first:  </span>-1 4/5 and 3 1/4

-1 4/5 = -(1 + 4/5)

= -(5/5 + 4/5)

= -9/5


3 1/4 = 3 + 1/4

= 3*4/4 + 1/4

= 12/4 + 1/4

= 13/4


so (-1 4/5) / ( 3 1/4)

= (-9/5) / (13/4)

= (-9/5) * (4/13)

= (-9*4) / (5*13)

= -36/65


3 0
3 years ago
Read 2 more answers
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