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Juli2301 [7.4K]
2 years ago
13

PLEASE ANSWER - BRAINLIEST IF 2 ANSWERS - 5 STAR RATING - THANKS (PROFILE TOO)

Mathematics
2 answers:
STALIN [3.7K]2 years ago
5 0

Answer:

<u>395.64 m³</u>

Step-by-step explanation:

<u>Volume (figure)</u>

  • Volume (hemisphere) + Volume (cylinder)
  • 2/3πr³ + πr²h
  • πr² (2/3r + h)
  • 3.14 x 9 (2 + 12)
  • 3.14 x 9 x 14
  • 3.14 x 126
  • <u>395.64 m³</u>
aev [14]2 years ago
5 0

Answer:

The answer is 396m^3.

Step-by-step explanation:

The solution is in the attached file

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A boat takes 5 hours to go upstream. It can go 50 miles downstream in the same time. Find the rate of the current in the rate of
natka813 [3]

Answer:

Rate of current is 3 miles per hour and speed of the boat in still water is 7 miles per hour.

Step-by-step explanation:

This question is incomplete; find the complete question here.

A boat travels 20 miles upstream in 5 hours. Going downstream, it can travel 50 miles in the same amount of time. Find the speed of the current and the speed of the boat in still water.

Let the speed boat in the still water = x miles per hour

and the speed (rate) of the current = y miles per hour

Speed of the boat to go upstream (against the current) will be = (x - y)miles per hour

Since boat takes 5 hours downstream to travel 50 miles then from the formula,

\text{Time}=\frac{\text{Distance}}{\text{Speed}}

5=\frac{50}{(x+y)}

(x + y) = 10 -------(1)

Boat takes 5 hours to travel 50 miles upstream then,

\text{Time}=\frac{\text{Distance}}{\text{Speed}}

5 = \frac{20}{(x-y)}

x - y = 4 -----(2)

By adding equation (1) and question (2)

(x + y) + (x - y) = 14

2x = 14

x = 7 miles per hour

From equation (1),

7 + y = 10

y = 3 miles per hour

Therefore, Rate of current is 3 miles per hour and speed of the boat in still water is 7 miles per hour.

5 0
3 years ago
23. ANALYZING EQUATIONS
tamaranim1 [39]

Answer:

9.5 in

Step-by-step explanation:

The receiver is placed at the focus of the parabola at a distance of 1/4a from the vertex. Here that would be 1/(4*(1/38)) or 38/4 inches or 9.5 in

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Lucy draws a line on a coordinate plane. Which transformation will always result in a line perpendicular to Lucy’s line? Questio
Ostrovityanka [42]

Lucy draws a line on a coordinate plane. We have to identify the transformation which will always result in a line perpendicular to Lucy’s line.

Referring to the given options.

By rotating 270 degrees clockwise around the origin, Lucy will get a line perpendicular to the Lucy's line. As, when we rotate 270 degrees clockwise about the origin, we multiplies the x coordinate by '-1' and interchanges the x and y coordinate, which gives the line which is always perpendicular to the Lucy's given line.

5 0
4 years ago
Francesco wants to figure out how many ounces in his tub of protein powder. His friend ordered that tub that was 48 ounces. Fran
Alex

Answer:

36

Step-by-step explanation:

0.75 is 3/4, so 48*0.75=48*3/4=36.

4 0
3 years ago
If four times a number is increased by 15 the result is three less than six times the number find the number
skad [1K]

Answer:

9

Step-by-step explanation:

Let the number be n.

Then:  4n + 15 = 6n - 3

Subtract 4n from both sides, obtaining:  15 = 2n - 3

Now add 3 to both sides, obtaining 18 = 2n.  Then n = 9.

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3 years ago
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