Jeffrey babysat three Saturdays in a row. He made $24.50 on the first Saturday, $18.75 on the second Saturday, and $32.25 on the third Saturday. How much money did Jeffrey make in all?
Responses
$64.40
$64.40 - no response given
$7,550
$7,550 - no response given
$75.50
$75.50 - no response given
$755.0
$75.50
Solar System Distances Quick Check 1 of 41 of 4 Items Question Use this paragraph: In a scale model of the solar system, the sun is placed at the center and the planets are shown orbiting in circles around it. Mars is 1.5 AU away from the sun and in the model, it appears at 30 cm from it which means that 1 AU = 20 cm. Likewise, Neptune is 30 AU away from the sun. What is the maximum possible distance that can be drawn between Mars and Neptune in the scale model? Hint: Two planets are as far apart as possible when they are on directly opposite sides of the sun from each other. Draw a picture with the planets as far apart as possible. (1 point) Responses 1.5 cm 1.5 cm 28.5 cm 28.5 cm 630 cm 630 cm 570 cm
The maximum possible distance that can be drawn between Mars and Neptune in the scale model is 570 cm.
Solar System Distances Quick Check 2 of 42 of 4 Items Question A human-operated spaceship reaches the moon in 3 days. The moon is about 386,400 km from Earth. Mars, our closest planetary neighbor, is, at its closest, about 140 times farther away from us than the moon if Mars stays in place. Assuming a very simple model of the solar system, about how long would it take that same spaceship to reach Mars?(1 point) Responses about 2.5 years about 2.5 years about 1 year about 1 year about 22.5 years about 22.5 years about 7.5 years
Assuming a very simple model of the solar system, it would take the spaceship about 7.5 years to reach Mars.
Use the diagram to answer the question. An illustration shows the sun and the eight planets. The planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. What is the main problem with this model if it were going to be used to study the dimensions of the solar system? (1 point) Responses The planets are shown as having different shapes. The planets are shown as having different shapes. The planets are represented in different sizes. The planets are represented in different sizes. The planets are placed at the same distance from each other. The planets are placed at the same distance from each other. The planets are depicted in different colors.
The main problem with this model if it were going to be used to study the dimensions of the solar system is that the planets are represented in different sizes.
Solar System Distances Quick Check 4 of 44 of 4 Items Question Why do astronomers use astronomical units (AU) instead of kilometers (km)?(1 point) Responses There are no km in outer space, only AU. There are no km in outer space, only AU. AU is used for spacing, while km is used for length. AU is used for spacing, while km is used for length. AU is used in astronomy, while km is used in physics. AU is used in astronomy, while km is used in physics. Large distances are easier to express in AU than in km.
The correct response is: Large distances are easier to express in AU than in km.
To find out how much money Jeffrey made in all, we need to add up the amounts he made on each Saturday.
Jeffrey made $24.50 on the first Saturday, $18.75 on the second Saturday, and $32.25 on the third Saturday.
To calculate the total, we add these amounts together:
$24.50 + $18.75 + $32.25 = $75.50
Therefore, Jeffrey made a total of $75.50.