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Studentka2010 [4]
3 years ago
8

What is half of 1:21 in minutes

Mathematics
2 answers:
garri49 [273]3 years ago
6 0

Answer:

40.5 seconds if it is 1:21 minutes

Step-by-step explanation:

60 seconds per minute plus 21 seconds is 81 seconds. Half of 80 is 40, half of 1 is 0.5. Together it is 40.5 seconds for half of 1:21 minutes.

ratelena [41]3 years ago
3 0

Answer:

Step-by-step explanation:

1:21 means 81 mins so 40.5 mins means 40 mins and 30 seconds( half minute)

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Use repeated addition to find the solution to each multiplication problem. Change any improper fractions to mixed numbers. 4x1/3
Nata [24]

Answer:

1\frac{1}{3}

Step-by-step explanation:

Given the following question:

4\times\frac{1}{3}

To find the answer simply multiply the numerators and the denominators by each other.

4\times\frac{1}{3}
4=\frac{4}{1}
\frac{4}{1} \times\frac{1}{3}
4\times1=4
1\times3=3
=\frac{4}{3}
\frac{4}{3} =4\div3=1\frac{1}{3}
1\frac{1}{3}

Hope this helps.

7 0
2 years ago
The radioactive isotope radium has a half-life of 1,600 years. The mass of a 100-gram sample of radium will be______ grams after
Olenka [21]
To solve this we are going to use the half life equation N(t)=N_{0} e^{( \frac{-0.693t}{t _{1/2} }) }
Where:
N_{0} is the initial sample
t is the time in years
t_{1/2} is the half life of the substance
N(t) is the remainder quantity after t years 

From the problem we know that:
N_{0} =100
t=200
t_{1/2} =1600

Lets replace those values in our equation to find N(t):
N(200) =100e^{( \frac{(-0.693)(200)}{1600}) }
N(200)=100e^{( \frac{-138.6}{1600} )}
N(200)=100e^{-0.086625}
N(200)=91.7

We can conclude that after 1600 years of radioactive decay, the mass of the 100-gram sample will be 91.7 grams.

8 0
3 years ago
At a New Car Dealership, a particular model comes in 3 different trim levels (CX, DX,
xxMikexx [17]

Answer:

B. 48

Step-by-step explanation:

Multiply all the numbers of choices together.

trim levels: 3

colors: 4

interior: 4

number of combinations = 3 * 4 * 4 = 48

7 0
3 years ago
Read 2 more answers
The most common women’s shoe size in the U.S. is reported to be an 8 1/2 . A shoe store uses a table like the one below to decid
vesna_86 [32]

Answer:

the answer is caca

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Neeeeeeeeeeeeeeed help!!!!!??!??!!
Elza [17]

Answer:

-15?

Step-by-step explanation:

It's hard to tell where the point is exactly

3 0
3 years ago
Read 2 more answers
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