Answer: Tv is an examle watching a work out video or maybe if your talking about how has it affected people over the years than sitting around and watching that, now lets get an example about phones. Phones are really affecting to sports you can be addicted to the phone. Hoped this helped!
a) 
The average speed is equal to the ratio between the total distance (
and the total time taken (
):
the distance travelled by the trucker in the first 3 hour can be written as the time multiplied by the velocity:
So the total distance is
The total time is equal to the first 3 hours + the time taken to cover the following 20 miles in the city:
So, the equation can be rewritten as:
b) 0.50 h (half a hour)
Since we know the value of the average speed, 
, we can substitute it into the previous equation to find the value of 
, the time the trucker drove in the city:
Answer:
a ratio is a comparison between two numbers.
Step-by-step explanation:
mark me brainliest if this helps :)
Short answer: 375 grams
Remark
You only need to set up a direct proportion
Givens
flour for 12 cakes = 150 grams
Number of cakes initially = 12
Amount of flouer for 30 cakes = x
Number of cakes = 30
Proportion
amount flour for 12 cakes / 12 cakes = x / 30
Sub and solve
150 grams / 12 cakes = x / 30 cakes Cross multiply
150 * 30 = 12 *x Multiply the left side.
4500 = 12 x Divide both sides by 12
4500/12 = x
375 grams for 30 cakes. <<<<< Answer
