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2 years ago

A orchard has 48 apple trees,30 peach trees, and 42 pear trees. In simplistic form, what fraction of the trees are peach trees?

Mathematics

2 answers:

choli [55]2 years ago

6 0

48+30+42= 120
30/120= 1/4

Fantom [35]2 years ago

4 0

30/100 because it is a proper fraction

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Umnica [9.8K]

Answer:

Answer is 15-r .Hope it will help you

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2 years ago

Half-life of Po-210 is 140 days. If the initial mass of the sample is 5

Anna35 [415]

Answer:

$0.625kg$

Step-by-step explanation:

we are given half-life of PO-210 and the initial mass

we want to figure out the remaining mass after 420 days

in order to solve so we can consider the half-life formula given by

$\displaystyle f(t) = a {0.5}^{t/T}$

where:

f(t) is the remaining quantity of a substance after time t has elapsed.
a is the initial quantity of this substance.
T is the half-life

since it halves every 140 days our T is 140 and t is 420. as the initial mass of the sample is 5 our a is 5

thus substitute:

$\displaystyle f(420)=5\cdot{0.5}^{420/140}$

reduce fraction:

$\displaystyle f(420)=5\cdot{0.5}^{3}$

By using calculator we acquire:

$\displaystyle f(420)=0.625$

hence, the remaining sample after 420 days is 0.625 kg

4 0

2 years ago

A university has 29,970 students. In a random sample of 285 students, 19 speak three or more languages. Predict the number of st

hodyreva [135]

Set up a proportion.
Let x = the number of students in 29970 who speak 3 or more languages.

285/19 = 29970/x Cross multiply
285 x = 19 * 29970
285x = 569430
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2 years ago

5(3a+b)−2(3a+b) in simplest form I NEED HELP!

nordsb [41]

Answer:

$9a + 3b$

Is the answer

Step-by-step explanation:

$5(3a + b) - 2(3a + b) \\ = 15a + 5b - 6a - 2b \\ = 9a + 3b$

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That is why

$( - 2) \times b = - 2$

And

$( - 2) \times 3a = ( - 6)$

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2 years ago

For a trip, Evelyn packed 6 blouses, 5 pairs of shorts, 3 pairs of jeans, and 1 skirt. Find the ratio of pairs of jeans to the t

IrinaVladis [17]

The answer is 3:12 if in total number of pieces of clothing Evelyn packed includes the jeans then it would be 3:15

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2 years ago