If Alina’s workout was 80 minutes, and Dane’s workout was 48 minutes, they spent the same amount of time on cardio exercise.
If both workouts were 60 minutes, Dane spent 8 more minutes on cardio exercise than Alina did.
Alina spent less time on cardio exercise than Dane did.
Answer:
If Alina’s workout was 80 minutes, and Dane’s workout was 48 minutes, they spent the same amount of time on cardio exercise.
Step-by-step explanation:
For option A,
If they both workout for minutes,
Alina's time is
and Dane's time is
The difference is
If they both work out for 100 minutes, then Dane did 10 more minutes of cardio exercise than Alina.
Since is not fixed, this statement is false.
For option B,
If Alina's work out was 80 minutes, then she spent minutes on cardio exercise.
If Dane's work out was 48 minutes, then he spent minutes on cardio exercise.
Hence both spent the same amount of time on cardio exercise.
The correct answer is option B
For option C,
If they both workout for minutes, then
Alina's time is
and Dane's time is
The difference is
If they both work out for 60 minutes, then Dane did 9 more minutes of cardio exercise than Alina and not 10.
This statement is false
For option D,
We cannot tell whether Alina spent more or less time than Dane,unless we know the time both spent for the entire work out.
A) between 2 and 2.1
B) between 1.5 and 2
C) between 2.1 and 2.2
D) between 2.3 and 2.4
And
what is the perimeter of square A2
Answer:
A1: 30 cm
A2: 20 cm
Step-by-step explanation:
1) Folding the square in half reduces two of the edges to half their former length, so the perimeter is now ...
sum of side lengths = 2·10 cm + 2·5 cm = 30 cm . . . A1
__
2) Again, the 10 cm edges are cut in half, so the perimeter of the square is ...
sum of side lengths = 2·5 cm + 2·5 cm = 4·5 cm = 20 cm . . . A2