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vitfil [10]
2 years ago
13

BRAINLIEST!!! 20 POINTS

Mathematics
2 answers:
Artist 52 [7]2 years ago
8 0

Answer:

3

Step-by-step explanation:

I'm sure if that shoe fits

Natalka [10]2 years ago
6 0

Answer:

All 3

Step-by-step explanation:

Brainliest please

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a car covers a distance of 490 km with a speed of 70km and then covers a speed of 90km calculate its average speed
DaniilM [7]
Average speed = total distance divided by total time.

In the first part, the car covered 490 km in 7 hours, but I think you mistyped the second part (“then covers a speed of 90km”) and a critical piece is missing to find the total distance and time.
3 0
2 years ago
Please help me with my homework problem
wel

Answer:

y-axis

Step-by-step explanation:

points are (x,y)

since the y-coordinate does not change, but the x-coordinate does, it rotates around the y-axis.

reflection just means it rotates 180 degrees (out of the paper, not around)

8 0
2 years ago
rows of chairs are set out for a wedding , there are 6 Chairs in the first row , 14 chairs in seconds row and 22 chairs in the t
Oxana [17]
Though question the answer is 294
5 0
3 years ago
HELP WILL MARK BRAINLIEST IF GOTTEN RIGHT
aliya0001 [1]

Answer:

10π (after use calculator)

Step-by-step explanation:

A = 2πr

so,

A = 2(π)(5)

A = 10π

then use your calculator

and u will get the answer

7 0
2 years ago
Read 2 more answers
The radius of a sphere was measured and found to be 20 cm with a possible error in measurement of at most 0.02 cm. What is the m
Elena L [17]

Answer:

D(V)  = 100,48 cm³

Step-by-step explanation:

The volume of a sphere is:

V(s) = 4/3 π*r³

Where r is the radius of the sphere

If we take derivative of V  respect r

D(V)/ dr  =  4/3*3*π*r²    ⇒ D(V)/ dr  = 4*π*r²   ⇒ D(V) =  4*π*r²*dr

We know:

r = 20 cm     and   dr  =  0,02  ( at most)

Then

D(V)  = 4*π*(20)²*0.02  cm³

D(V)  = 32*π      

D(V)  = 100,48 cm³

7 0
3 years ago
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