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rjkz [21]
2 years ago
12

An elevator is on the tenth floor and drops 7 floors but then rises 12 floors. On what floor is the

Mathematics
2 answers:
vaieri [72.5K]2 years ago
5 0

Answer:

D. 15th floor

Step-by-step explanation:

10-7=3, 3+12=15

Vera_Pavlovna [14]2 years ago
3 0
The answer is D, the 15th floor
You might be interested in
Which ratio is smaller 3/5 or 7/10
Oksanka [162]

3/5=6/10

So 6 being smaller than 7 means 3/5 is smaller than 7/10

5 0
3 years ago
Order this starting from the smallest:
lara31 [8.8K]
I think it might be easier to understand if i change decimals to fractions, so lets start ;)
15.249=15\frac{249}{1000}
15.3=15.300=15\frac{300}{1000}
15.05=15.050=15\frac{50}{1000}
15.009=15\frac{9}{1000}
15.25=15.250=15\frac{250}{1000}

denominators are the same so now you only have to compare numerators (biger numerator = greater fraction)

so:

15\frac{9}{1000}

it means that:


15.009
4 0
3 years ago
Read 2 more answers
A pigeon can fly 84 kilometers per hour. how long does the pigeon take to fly 7 kilometers?
Leviafan [203]
84 kilometers ... 1 hour
7 kilometers ... x hours = ?

If you would like to know how long does the pigeon take to fly 7 kilometers, you can calculate this using the following steps:

84 * x = 1 * 7
84 * x = 7      /84
x = 7/84
x = 1/12 hour

Result: A pigeon can fly 7 kilometers in 1/12 hour.
6 0
3 years ago
Read 2 more answers
Consider randomly selecting a student at a large university, and let A be the event that the selected student has a Visa card an
ziro4ka [17]

Answer:

1) is not possible

2) P(A∪B) = 0.7

3) 1- P(A∪B) =0.3

4) a) C=A∩B' and P(C)= 0.3

b)  P(D)= 0.4

Step-by-step explanation:

1) since the intersection of 2 events cannot be bigger than the smaller event then is not possible that P(A∩B)=0.5 since P(B)=0.4  . Thus the maximum possible value of P(A∩B) is 0.4

2) denoting A= getting Visa card , B= getting MasterCard the probability of getting one of the types of cards is given by

P(A∪B)= P(A)+P(B) - P(A∩B) = 0.6+0.4-0.3 = 0.7

P(A∪B) = 0.7

3) the probability that a student has neither type of card is 1- P(A∪B) = 1-0.7 = 0.3

4) the event C that the selected student has a visa card but not a MasterCard is given by  C=A∩B'  , where B' is the complement of B. Then

P(C)= P(A∩B') = P(A) - P(A∩B) = 0.6 - 0.3 = 0.3

the probability for the event D=a student has exactly one of the cards is

P(D)= P(A∩B') + P(A'∩B) = P(A∪B) - P(A∩B) = 0.7 - 0.3 = 0.4

3 0
3 years ago
Joel wants to buy a new tablet computer from a store having a 20% off sale on all tablets. The tablet he wants has an original c
Olegator [25]

Answer:

A. $179.55

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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