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miv72 [106K]
3 years ago
13

Beth has made 12 cupcakes.This is 30% of the cupcakes she must make.How many cupcakes must she make?

Mathematics
2 answers:
san4es73 [151]3 years ago
7 0
12/3 = 4 30/3 =10% (4cupcakes is 10%)
4x10 = 40 10x10= 100 (40 cupcakes is 100%)
ipn [44]3 years ago
3 0
12 cupcakes ------------ 30%
x (cupcakes) ------------- 100% 

12 cupcakes ----------------- 0,3
x (cupcakes) --------------------- 1
0,3*x=12*1
0,3x=12    /:0,3
x= 12 : 0,3
x=40

She must make 40 cupcakes.
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Boston, Massachusetts had a population of 617,594 people during January 1 2010, and 675,647 people on January 1 2020.
tigry1 [53]

Answer:

  • See below

Step-by-step explanation:

<u>Exponential function is:</u>

  • y = abˣ

<u>If we consider the time difference in years as x and the initial population as a, then we get:</u>

  • 675647 = 617594*b¹⁰

<u>Find the value of b:</u>

  • b¹⁰ = 675647/617594
  • b¹⁰ = 1.09399864636
  • b = 1.09399864636^(1/10)
  • b = 1.009 (rounded)

<u>The equation we got is:</u>

  • y = 617594*1.009ˣ

Here we have y- population after x years since 2010, x - the number of years since 2010 and 1.009 is the population growth rate.

5 0
2 years ago
A pack of water bottles contains 24 bottles. A man decided to buy 3 bottles of water. How much bottles of water did he buy?
lukranit [14]

Answer: 1/8 pack

Step-by-step explanation:

Pack of bottles = 24 bottles

Bought = 3 bottles

24 bottles ___ 1 pack

3 bottles ___ x= 3/24 pack

(3 bottles * 1 pack) / ( 24 bottles) = 3/24 packs = 1/8 pack

3 0
3 years ago
Please help out with this if you can.
Pepsi [2]

Answer:

3/7 and 4/17

Step-by-step explanation:

a) given that Shen is playing a game and the probability of unlocking the treasure test is 3/10.

To find the odds in favour of his character unlocking the treasure chest.

Since probability = 3/10 we have favourable and total are in the ratio 3:10

i.e. favourable:Favourable+unfavourable= 3:3+7

Hene odds= favourable:unfavourable =3/7

Answer is 3/7

b) Given that odds against choosing a blue block are 13/4

This means there are 4 blue blocks and 13 other colour blocks.

Total blocks= 13+4 =17

No of blue blocks = 4

Probability of selecting blue block=4/17


6 0
3 years ago
Jose left the white house and drove toward the recycling plant at an average of 40km/h. Rob left some time later driving in the
tiny-mole [99]
I would think it would be 200km before rob caught up with him?
6 0
3 years ago
2.5 ml medication.how many teaspoon should be given
Verdich [7]

5ml=1 teaspoon

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so 2.5ml is equal to half teaspoon

5 0
3 years ago
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