A student earns scores of 80, 87, and 82 on the first three of four tests. If the student wants to achieve a quiz average of 85,
1 answer:
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Answer:
$1200.
Step-by-step explanation:
We have been given that Kiersten runs a website that helps people learn programming. Every month, Kiersten receives a subscription fee of $10 from each of the subscribers to her website.
Let us find number of subscriber that will pay this month Kiersten for her online business.
Last month, the website had 100 subscribers. This month, 30 new members joined the website, and 10 members cancelled their subscription, therefore, number of subscriber this month will be subscribers.
To find amount that Kiersten will receive from online business we will multiply 10 by 120.
Therefore, Kiersten will earn $1200 from online business this month.
Answer:
The speed of the plane in still air is 89.83 mph and the speed of air is 8.17 mph.
Step-by-step explanation:
Let the speed of the plane in still air is u mph and the speed of the wind is v mph.
Now, the aircraft flew 490 miles in 5 hours with the wind.
Hence, ........ (1)
Now, the aircraft flew 490 miles in 6 hours against the wind.
So, ............ (2)
Now, adding equations (1) and (2) we get,
2u = 179.67
⇒ u = 89.83 mph
Now, from equation (1) we get,
v = 98 - u = 98 - 89.83 = 8.17 mph.
Therefore, the speed of the plane in still air is 89.83 mph and the speed of air is 8.17 mph. (Answer)
