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ivann1987 [24]
3 years ago
12

Find the surface area and volume of a sphere with a radius of 7 in. Round answers to tenths as necessary.

Mathematics
1 answer:
Kamila [148]3 years ago
7 0

Answer:

Surface Area: 615.75

Volume: 1436.76

Step-by-step explanation:

The equation for the surface area of a sphere is 4*pi*r^2

Just do 4*3.14*7*7

The equation for the volume of a sphere is 4/3*pi*r^3

Just do 1.33*3.14*7*7*7

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A house and lot together cost more than $89,000. The house cost $1000 more than seven times the cost of the lot. How much does t
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12,571.4286 you subtract 1000 from the total, and divide by 7.
6 0
3 years ago
a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has how much energy?​
erica [24]

Answer:

28

Step-by-step explanation:

i got my answer by dividing my answer and i got 28

7 0
3 years ago
Let R be a relation on the set of all lines in a plane defined by (l 1 , l 2 ) R line l 1 is parallel to l 2 . Show that R is
MArishka [77]

Answer: hello your question is poorly written below is the complete question

Let L be the set of all lines in XY plane and R be the relation in L defined as R = {(L1, L2): L1 is parallel to L2}. Show that R is an equivalence relation. Find the set of all lines related to the line y = 2x + 4.

answer:

a ) R is equivalence

b) y = 2x + C

Step-by-step explanation:

<u>a) Prove that R is an equivalence relation </u>

Every line is seen to be parallel to itself ( i.e. reflexive ) also

L1 is parallel to L2 and L2 is as well parallel to L1 ( i.e. symmetric ) also

If we presume L1 is parallel to L2 and L2 is also parallel to L3 hence we can also conclude that L1 is parallel to L3 as well ( i.e. transitive )

with these conditions we can conclude that ; R is equivalence

<u>b) show the set of all lines related to y = 2x + 4 </u>

The set of all line that is related to y = 2x + 4

y = 2x + C

because parallel lines have the same slopes.

5 0
3 years ago
I WILL MARK YOU BRAINLIEST!I REALLY NEED HELP WITH 20 PLEASE HELP ME
Finger [1]

Answer:

AP is 11.25 so the answer is F

Step-by-step explanation:

Since they are similar triangles (due to the ~ symbol)

You can write this:

AC/XZ = AP/XQ

since XZ=12

XQ=5

AC=27

you can write:

27/12=AP/5

then cross multiply:

27x5=135

135/12=11.25

AP is 11.25

6 0
3 years ago
Help due by 11 it 10 :55
belka [17]

Answer: 0.11

Step-by-step explanation: (2/3) / 6 = 0.11

4 0
3 years ago
Read 2 more answers
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