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alexgriva [62]
3 years ago
11

Find the amount of tip on a $75 bill if a 15% tip is left

Mathematics
1 answer:
Alinara [238K]3 years ago
4 0
11.25

Convert 15% to decimal of 0.15
Then multiply 0.15 by 75 to get 11.25
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Wouldn’t frank be able to make 32 widgets in 8 hours
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If a=2,b=1 and c=1 than evalute ab+bc​
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3

Step-by-step explanation:

2x1+1x1

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for every girl taking classes at the martial arts school there are three boys who are taking classes at the school if there are
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3 years ago
The half-life of cesium-137 is 30 years. Suppose we have a 20 mg sample.
Tju [1.3M]

Answer:

(a) A = (20mg)/(2^(t/30))

(b) 12.6mg

(c) 129.6years

Step-by-step explanation:

To calculate the amount remaining after a number of half-lives, n, we can make use of:

A = \frac{B}{2^n}

Where A = amount remaining

B = initial amount

n = \frac{t}{t_{0.5}}

(a) A = (20mg)/(2^(t/30))

(b) Mass after 20years

A = (20mg)/(2^(20/30)) ≈ 12.6mg

(c) After how long will only 1mg remain:

1mg = (20mg)/(2^(t/30))

20mg = {2^{\frac{t}{30}}

Taking log of both sides we have:

Log(20) = (t/30)log(2)

t/30 = (log(20))/(log(2)) ≈ 4.3

t/30 = 4.3

t = 30 x 4.3 ≈ 129.6years.

8 0
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And:
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Answer:
The equation is:
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We can also solve this equation:
6 - 3 t + 1.5 t = 5
1.5 t = 1
t = 0.66 h = 2/3 h = 40 min.
5 0
3 years ago
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