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Gekata [30.6K]
2 years ago
10

Revathi reached her grandparents' place at 9:20 a.M. After travelling in a train for 9 hrs and 37 mins. What time did her train

start from the station?
Mathematics
1 answer:
PtichkaEL [24]2 years ago
7 0

Answer:

Starting time = 11:43 pm last night

Step-by-step explanation:

The time that her train started from the station is as follows

Given that

Grandparents reached the place at 9:20AM

The travelled time is 9 hours and 37 mins i.e. 9:37 hours

Starting time = Reached time - journey time

Starting time = 9:20 am - 9:37 hrs

= 11:43 pm last night

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Nitella [24]
2-0.5=1.5
3.5-2=1.5
Therefore difference is 1.5=n
1.5n-1 is nth term
When n=20
=29
7 0
2 years ago
On each of 3 days Derrick rode 6.45 km to school 150 meters to the library and then 500 m back home how many km did he ride for
KengaRu [80]
Derrick rode 21 total km. 

You can find this by adding the 3 distances together and multiplying by 3. Also remember to watch the units as 500m = .5km. 
5 0
3 years ago
Write thirty -eight and ninety-seven hundredths kilograms in standard form
frez [133]
38.97 would be standard form
3 0
3 years ago
The half life of silicone-32 is 710 years. If 30 grams is present now, how much will be present in 300 years?
Irina18 [472]

Answer:

22.38 g of silicone-32 will be present in 300 years.

Step-by-step explanation:

A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay and its given by

                                           N(t)=N_0(\frac{1}{2})^{\frac{t}{t_{1/2}}

where,

N(t) = quantity of the substance remaining

N_0 = initial quantity of the substance

t = time elapsed

t_{1/2} = half life of the substance

From the information given we know:

  • The initial quantity of silicone-32 is 30 g.
  • The time elapsed is 300 years.
  • The half life of silicone-32 is 710 years.

So, to find the quantity of silicone-32 remaining we apply the above equation

N(t)=30\left(\frac{1}{2}\right)^{\frac{300}{710}}=30\left(\frac{1}{2}\right)^{\frac{30}{71}}\approx22.38 \:g

22.38 g of silicone-32 will be present in 300 years.

7 0
2 years ago
Please help! Show work!
Thepotemich [5.8K]

Answer:

the answer is im back and i dont know

Step-by-step explanation:

hi wanna talk i was rlly sick



4 0
3 years ago
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