Answer:
The temperature decreased by 9 °F in <u>6 days.</u>
Step-by-step explanation:
Let the number of days it takes for the temperature to decrease by 9 °F be
.
Given:
Average daily temperature decreases by
°F.
Decrease of temperature in 1 day =
= 1.5 °F.
∴ Decrease in temperature in x days is
.
Now, as per question, decrease in temperature in 'x' days is 9 °F.
Therefore, 


Therefore, the temperature decreased by 9 °F in 6 days.
Plug in 3 for x and solve for k.
(3)^2-3k+21=0
3k=9+21
3k=30
k=10
Here you can use proportion:
The ratio betwen €1.2 to £1
is the same as the ratio between €180 to £x
Mathematically this means that
.
Now

Answer: €180 is £150
Answer:
1262.0288
Step-by-step explanation:
2×3.14×200.96
I would help you but I can't see it maybe zoom in a little closer.