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Sever21 [200]
2 years ago
7

What should replace the ? to make the following statement true? ? 9/11 = ?/88

Mathematics
1 answer:
Feliz [49]2 years ago
5 0

Answer:

72

Step-by-step explanation:

9/11 = ?/88

<em>multiply each side by 8 (because 88 divided by 11 is 8)</em>

72/88 = ?/88

<em>multiply each side by 88</em>

72 = ?

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A lake has a small patch of lily pads and every day the patch grows to double its size. It takes 32 days for the patch to cover
S_A_V [24]

Answer:

<em>It took 31 days for the patch to cover half the lake</em>

<em></em>

Step-by-step explanation:

The patch grows to double its size everyday

the patch completely covers the lake in 32 days

Since the patch doubles itself everyday, this means that the previous day before the 32nd day, the lake was just half covered.

Therefore, the the patch covered half the lake on the 31st day, i.e <em>it took 31 days for the patch to cover half the lake</em>

<em></em>

6 0
3 years ago
19. A spherical balloon has a circumference of 19cm. what is the approximate surface area of the balloon to the nearest square c
Tamiku [17]
The main formula of a spherical surface area is SA= 4 x Pi x r²
the circumference is C= 19cm =2 Pi r, so r = C/ 2Pi = 19 / 6.28 =3.02cm
so the surface area can be found by computing
SA= 4x 3.14x 3.02² =114.5, the nearest square centimeter is <span>A) 114 cm^2</span>
5 0
3 years ago
Two​ researchers, Jaime and​ Mariya, are each constructing confidence intervals for the proportion of a population who is​ left-
soldi70 [24.7K]

Answer:

Jaime's. Interval not centered around the point estimate.

Step-by-step explanation:

When constructing a confidence interval based on a point estimate, the obtained point estimate must be the central value of the interval.

For Jaime's interval

Lower bound = 0.078

Upper Bound = 0.193

Central = \frac{0.078+0.193}{2} =0.1355

For Mariya's interval

Lower bound = 0.051

Upper Bound = 0.189

Central = \frac{0.051+0.189}{2} =0.12

For a point estimate of 0.12, only Mariya's interval is adequate since Jaime's is not centered around the point estimate.

4 0
2 years ago
F(-2)when f(x) = 2x^2 - 3x + 28? <br><br> ^ = squared
horsena [70]
The answer of f(-2) is 42
6 0
2 years ago
Read 2 more answers
What is the product of 4/10 and 2/3?
Rudiy27
4/10 multiplied to 2/3 is 4/15.
8 0
3 years ago
Read 2 more answers
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