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Johnathan V.

Online Tutor from UCSD

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Pre-Algebra

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Question:

If a traveler came to New York with 3.75 Euros, would they be able to afford a $7.00 meal if the exchange rate is $1 = 0.70 Euros?

Johnathan V.

Answer:

The answer would be no because since the exchange rate is $1 = 0.70 Euros. A $7 meal in New York would cost the European traveler 4.90 Euros as $1*7 = 0.70*7 Euros -> $7 = 4.90 Euros. Given that the European traveler arrived in New York with 3.75 Euros < 4.90 Euros, it's not possible for the European traveler to afford the meal at all.

Basic Math

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Question:

Jonas polled his school of 1,390 students. He found that 25% of the students enjoy going to the movies. Students' other favorite pastimes are reading, playing sports, and playing video games. How many students enjoyed reading?

Johnathan V.

Answer:

Do we have enough information? For instance, we know how many students there are in the school, how many students like going to the movies, and the other pastimes of the students. However, we don't know what percentage of students enjoy reading. Therefore, we don't have enough information to answer the question.

Algebra

TutorMe

Question:

Amalia hits a volleyball at a velocity of 15 meters per second. If the ball was hit from a height of 1.8 meters, determine the time it takes for the ball to land on the floor. Assume that the ball is not hit by another player.

Johnathan V.

Answer:

H(t) = (-1/2)*gt^2 + vt + h 0 = (-1/2)(9.8)t^2 + 15t + 1.8 0 = -4.9t^2 + 15t + 1.8 t = quadratic formula -> t = -0.11 seconds or t = 3.17 seconds However, time cannot be negative so the actual answer is t = 3.17 seconds!

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