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3 years ago

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Julie is doing an experiment. She is studying a cell that triples every hour. She started the experiment with 24 cells. How many

cells are there at the end of 4 hours?

1 answer:

gtnhenbr [62]3 years ago

7 0

I think the answer would be 288, i hope this helps

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Pls help i give u brainliest and 5 stars

Umnica [9.8K]

Answer:

Step-by-step explanation:

Diameter = 14 cm

r = 14/2 = 7 cm

Outer surface area of hemisphere =2πr²

= 2π*7*7

= 98π cm²

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3 years ago

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Round 307 to neatest tens

hammer [34]

310 is the nearest tenth
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When paid flat a round parachute has a diameter of 8 meters. What is the parachute’s circumference

mariarad [96]

Answer:

25.12 meters

Step-by-step explanation:

The circumference of a circle is given by

$c=2\pi r$ (1)

where:

$\pi\sim 3.14$

r is the radius of the circle

In this problem, the parachute has a diameter of 8 meters:

d = 8 m

The radius of a circle is equal to half of its diameter, so the radius of the parachute is:

$r=\frac{d}{2}=\frac{8}{2}=4 m$

And therefore, by applying eq.(1) we can find the circumference of the circle:

$c=2\pi r=2\cdot 3.14 \cdot 4 = 25.12 m$

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3 years ago

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Write the equation x² + 6x + y² – 8y = 19 in standard form.

kirza4 [7]

Answer:

Formula used :

<u>x²+2xy+y²</u><u> </u><u>=</u><u> </u><u>(x+y)²</u>
<u>x²-2xy+y²</u><u> </u><u>=</u><u> </u><u>(x-y)²</u>

$→{x}^{2} + 6x + {y}^{2} - 8y = 19 \\ ({x}^{2} + 2.3.x + {3}^{2} ) +({y}^{2} - 2.4.y + {4}^{2} ) = 19 + {3}^{2} + {4}^{2} \\ {(x + 3)}^{2} + {(y - 4)}^{2} = 19 + 9 + 16 \\ \boxed{ {(x + 3)}^{2} + {(y - 4)}^{2} = 44}✓$

<u>3) (x+3)²+(y-4)²=44</u> is the right answer.

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3 years ago

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A candle burns down at the rate of 0.5 inches per hour. The original height of the candle was 9 inches.

Debora [2.8K]

<span>You can get those ordered pairs subtracting 9-0.5, then that result minus 0.5 because from the rate the candle reduces its height 0.5inches per each hour.Part B: Is this relation a function? Yes, because each value of x has a single result or output in “y” (image)Part C: Yes, only difference is the time, the candle reduces its height 0.45 inches per each hour, examples of ordered pairs: (0,9) (1,8.55) (2,8.1)</span>

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3 years ago