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emmainna [20.7K]

2 years ago

5

HELP ME PLS! ASAP 10 POINTS FOR THIS ONE & THE NEXT ONE!!!!!! ❗️

1 answer:

7nadin3 [17]2 years ago

3 0

Hope this helps!!!!

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Why is randomization important when setting up an experiment to answer this research question?

Leokris [45]

Answer:

Answer c !

Step-by-step explanation:

Hope this helps c:

6 0

2 years ago

The radius of a spherical balloon is measured as 20 inches, with a possible error of 0.03 inch. Use differentials to approximate

soldi70 [24.7K]

Answer:

a) $V = 33510.322\,in^{3}$ , b) $A_{s} = 5026.548\,in^{2}$ , c) $\% V = 0.450\,\%$ , $\%A_{s} = 0.300\,\%$ .

Step-by-step explanation:

The volume and the surface area of the sphere are, respectively:

$V = \frac{4}{3}\pi \cdot r^{3}$

$A_{s} = 4\pi \cdot r^{2}$

a) The volume of the sphere is:

$V = \frac{4}{3}\pi \cdot (20\,in)^{3}$

$V = 33510.322\,in^{3}$

b) The surface area of the sphere is:

$A_{s} = 4\pi \cdot (20\,in)^{2}$

$A_{s} = 5026.548\,in^{2}$

c) The total differentials for volume and surface area of the sphere are, respectively:

$\Delta V = 4\pi\cdot r^{2}\,\Delta r$

$\Delta V = 4\pi \cdot (20\,in)^{2}\cdot (0.03\,in)$

$\Delta V = 150.796\,in^{3}$

$\Delta A_{s} = 8\pi\cdot r \,\Delta r$

$\Delta A_{s} = 8\pi \cdot (20\,in)\cdot (0.03\,in)$

$\Delta A_{s} = 15.080\,in^{2}$

Relative errors are presented hereafter:

$\%V = \frac{\Delta V}{V}\times 100\%$

$\%V = \frac{150.796 \,in^{3}}{33510.322\,in^{3}}\times 100\,\%$

$\% V = 0.450\,\%$

$\% A_{s} = \frac{\Delta A_{s}}{A_{s}}\times 100\,\%$

$\% A_{s} = \frac{15.080\,in^{2}}{5026.548\,in^{2}}\times 100\,\%$

$\%A_{s} = 0.300\,\%$

4 0

2 years ago

Which equation could you use to solve for x in the proportion 4/5=9/x?

Margarita [4]

Answer:

Hope u liked it..............

3 0

3 years ago

A vertical pole 6 feet long casts a shadow 55 inches long. Find the angle of elevation of the sun. Draw a diagram and find the a

ivolga24 [154]

A vertical pole(AB) 6 feet long casts a shadow(CB) 55 inches long as shown in the attached image. Since the angle of elevation of sun is $\angle C$ . We hav to find the value of $\angle C$ .

Firstly, we will change the dimensions of pole(in feet) to the dimension of shadow( in inches) . So, that the dimensions of pole and shadow are same.

Since, 1 feet = 12 inches.

6 feet = $6 \times 12 = 72$ inches.

Now, let us consider the triangle ABC in the attached image,

We have to find $\angle C$

$tan\Theta =\frac{Perpendicular}{base}$

$\tan C$ = $\frac{AB}{BC}= \frac{72}{55}$

= 1.309

$= 52.6^{\circ} = 53^{\circ}$

8 0

3 years ago

Read 2 more answers

PLEASE HELP!!!!!!! I'LL MARK YOU AS BRAINLIEST AND GET 15 POINTS

morpeh [17]

Answer:

The answer is probably C.

Step-by-step explanation:

So how the answer is C is,

It makes sense to divide x by 18 to get your answer. 2/5 is what you'll divided 18 by.

8 0

2 years ago