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lapo4ka [179]
3 years ago
15

Lily likes to collect records. Last year she had 10 records in her collection. Now she has 13 records. What is the percent incre

ase of her ​collection?
Mathematics
1 answer:
mojhsa [17]3 years ago
5 0

Answer:

3%

Step-by-step explanation:

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Pls answer this now pls i beg u i need to past it on school :) thank you so much​
ELEN [110]

Answer: 13.85kg Hope this helps, please consider making me Brainliest.

Step-by-step explanation:

Let's add! 7 1/4 + 6 3/5 = 7.25 + 6.6

7 + 6 + .25 + .6 = 13 + .85 =

13.85

8 0
1 year ago
Read 2 more answers
please factor completely !Thank yoy
Vilka [71]
You can download the app photo math and that will help you
8 0
3 years ago
Consider an object moving along a line with the given velocity v. Assume t is time measured in seconds and velocities have units
Yakvenalex [24]

Answer:

a) positive direction: t < 2s & t>6s   ; negative direction: 2s < t < 6s

b) 7 m

c) 71 m

Step-by-step explanation:

Given:

v(t) = 3t^2 -24t +36   [0 , 7]

Find:

a) The value of time when particle is moving in positive direction:

The change in direction of the particle can be determined by v(t) > 0

Hence,

                                    0 < 3t^2 -24t +36

                                    0 < t^2 - 8t + 12

                                    0 < (t - 2)*(t - 6)

                                    t < 2s  , t  > 6s  

The particle travels in positive direction in the interval t < 2s and t > 6s , While it travels in negative direction when 2s < t < 6s.

b) The displacement ds over the given interval [ 0 , 7 ]

                                  ds = integral (v(t)).dt

                                  ds = t^3 -12t^2 +36t

                                  ds = 7^3 -12*7^2 +36*7

                                  ds = 7 m

c) Total distance traveled in the interval:

                                 Total distance= ds(0-2) + ds(2-6) + ds(6-7)

                                 D = 2*(2^3 -12*2^2 +36*2) - 2*(6^3 -12*6^2 +36*6) + 7

                                 D = 2*32 - 2*0 + 7

                                 D = 71 m          

     

6 0
3 years ago
Toma walked 2 3/10 miles on Monday. He walked 1 2/5 miles on Tuesday. How many miles did he walk?
marta [7]

Answer:

He walked 3 7/10 miles.

8 0
2 years ago
Read 2 more answers
Answer Choices:
tatiyna

Answer:

positive infinity bc it is going up

5 0
3 years ago
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