3 years ago

WILL GIVE BRAINLIEST PLZ HELP ASAP

1 answer:

4 0

To solve this problem you must apply the proccedure shown below:
a)
1. You must rewrite the formula for calculate the volume of a sphere:
V=4πr³/3
2. Susbtitue r by d/2 and then solve for d, as following:
V=4π(d/2)³/3
V=(4πd³/8)/3
V=4πd³/24
24V=4πd³
d³=24V/4π
d=∛(24V/4π)
d=2∛(3V/4π)
b) V=4πr³/4
r=d/2
r=(2/3 cm)/2
r=1/3 cm=0.33 cm
V=0.15 cm³

You might be interested in

5) For the fraction 3/25, (a) write a percent and (b) write a decimal.

harkovskaia [24]

12% and 0.12 are the percentages and deciamls

5 0

2 years ago

find the simple interest earned to the nearest cent for principal interest rate and time. $570, 6% , 1 year

olasank [31]

Answer:

34.2

Step-by-step explanation:

570 x 0.06 6% is the interest

4 0

3 years ago

Suppose that the mean time that visitors stay at a museum is 94.2 minutes with a standard deviation of 15.5 minutes. The standar

Maurinko [17]

Answer:

$94.2 -0.994*3.1 = 91.1186$

$94.2 +0.994*3.1 = 97.2814$

And the 68% confidence interval is given by (91.1186, 97.2814)

Step-by-step explanation:

For this case we know that mean time that visitors stay at a museum is given by:

$\bar X = 94.2$

The standard deviation is given by:

$s= 15.5$

And the standard error is given by:

$SE = \frac{s}{\sqrt{n}} =3.1$

And we want to interval captures 68% of the means for random samples of 25 scores and for this case the critical value can be founded like this using the normal standard distribution or excel:

$z_{\alpha/2}= \pm 0.994$

We can find the interval like this:

$\bar X \pm ME$

And replacing we got:

$94.2 -0.994*3.1 = 91.1186$

$94.2 +0.994*3.1 = 97.2814$

And the 68% confidence interval is given by (91.1186, 97.2814)

7 0

3 years ago

Sherri has 23 pieces of jewelry to sell. She sells the bracelets for $2 and the necklaces for $3, and earns a total of $55. If t

Oksana_A [137]

2x+3y=55

Step-by-step explanation:

5 0

3 years ago

The ratio of Michael and Neil’s ages is 7:6. If Neil is really 42 years old, how old is Michael?

Anit [1.1K]

Answer:

49 years old.

Step-by-step explanation:

By proportion 7/6 = M/42 where M is Michael's age.

6M = 7 * 42

M = (7*42) / 6

M = 7 *7

= 49.

6 0

3 years ago

**WILL GIVE BRAINLIEST** PLZ HELP ASAP

WILL GIVE BRAINLIEST PLZ HELP ASAP