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il63 [147K]
3 years ago
7

A scientist uses 3/4 of an ounce of sulfuric acid each day. How many days does it take him to empty a jar, if each jar contains

24 ounces of sulfuric acid ?
Mathematics
1 answer:
Basile [38]3 years ago
6 0

Answer:

32 days

Step-by-step explanation:

Assume that the jar is full initially, containing 24 oz.  After how many withdrawals of 3/4 oz will the jar be empty?

24 - (3/4)n = 0, or

24 = (3/4)n, or 96 = 3n.  Dividing both sides by 3, we get n = 32.

The jar will be empty after 32 days.

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Fern knitted 20 scarves over 5 nights. After 8 nights of knitting, how many scarves would fern have made in total.
Studentka2010 [4]

Answer:

Fern will knit 32 scarves in 8 nights.

Step-by-step explanation:

Number of scarves knitted by Fern in 5 night = 20

Relation between number of scarves knitted and number of nights is proportional,

Therefore, Number of scarves knitted (s) ∝ Number of nights spent to knit the scarves (n)

s ∝ n

s = kn

k = \frac{s}{n}

Here, k = proportionality constant

For s = 20 and n = 5,

k = \frac{20}{5}

k = 4 scarves per night

For 8 nights, by using the same proportionality rule,

k = \frac{s}{8}

4 = \frac{s}{8}

s = 32 scarves

Therefore, Fern will knit 32 scarves in 8 nights.

4 0
3 years ago
Gcf and lcm of 6 and 9
nadya68 [22]

the lcm is 18

the gcf is 3

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3 years ago
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frutty [35]
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8 0
3 years ago
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Ben bowled 121 and 184 in his first two games. What must he bowl in his third game to have an average of at least 170​?
vagabundo [1.1K]

Answer:

205

Step-by-step explanation:

Were gonna start by writing an equation (121+184+x)/3=170 because were adding a 3rd value to the average and x is going to be our value that were looking for. If you solve that, you get 205. Hope this helps.

6 0
3 years ago
Prime factorisation of 49, 56,42 plz answer
ra1l [238]
49=7²
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3 years ago
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