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Semenov [28]
3 years ago
9

Can you please help me with Questions #18-22 on this Math Worksheet

Mathematics
1 answer:
CaHeK987 [17]3 years ago
3 0

21. 4x+4y
22. 16 girls
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The volume of the sphere is 500/3 pie cubic units . what is the value of X?
lilavasa [31]
Volume=4/3 pi r^3. so 4/3 pi r^3 = 500/3 pi. Therefore, divide by pi, and multiply by 3, you get 4r^3=500. Divide by 4 to get r^3=125, and cube root to result in 25. r=25.
7 0
3 years ago
The mass of a proton is approximately 1.67 x 10−24, and the mass of an electron is approximately 9.11 x 10−28. Find the approxim
nataly862011 [7]

Answer:

≈ 1833

Step-by-step explanation:

To find ratio of proton mass to electron mass, we have to divide.

The numbers are given in <em>scientific notation</em>.

Let a number be  a*10^b and another be  c*10^d, when we divide, we will follow the rule shown below:

\frac{a*10^b}{c*10^d}=(\frac{a}{c}*10^{b-d})

Now, we use the information given to find the ratio:

\frac{1.67*10^{-24}}{9.11*10^{-28}}\\=(\frac{1.67}{9.11}*10^{-24--28})\\=0.1833*10^4

This means we can find the number by taking 4 decimal places to the right, so that would becomes:

0.1833*10^4=1833

The approximate ratio is 1833 [mass of proton is around 1833 times heavier than mass of electron]

7 0
3 years ago
Read 2 more answers
PLEASE HELP ME ASAP!<br> Find are and perimeter!!!!
dangina [55]
Area =  the top semicircle + the rectangle AEBD

= 1/2 pi*6^2 + 6*12  =  128.55 cm^2 to nearest 100th

Perimeter = 6pi + 12 + 2 pi * 3 = 49.70 cm
6 0
3 years ago
These are the values in Min-Su’s data set.
Ber [7]
The answer is (4,5) (5,-5) (6,-4) (7,3) (8,1).
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3 years ago
What makes a square a square <br> why isn't a rectangle?
Lilit [14]
A square is a geometrical figure that has 4 congruent sides and angles. This means all side lengths and angles are the same.

A rectangle is a geometrical figure that has 4 similar sides but are not the same length. However, a rectangle does have congruent angles. A rectangle has 2 sides that are double the other 2 sides, in which both of each (length & width) have the same measurement.

I hope this helps!
3 0
3 years ago
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