Answer:

Step-by-step explanation:
The graph decreases. That meand the slope is in negative.

where m = slope and b = y-intercept. If the slope is positive, the graph will increase. Otherwise, decrease.
The only choice that the slope is negative is the third choice.
Answer:
The total mass is 4 * 10^12 grams
Step-by-step explanation:
To get the total mass of all ants,
We simply multiply the average mass of an ant by the population
That will be;
4 * 10^-3 * 10^15
= 4 * 10^12 grams
Answer:
See solution below.
Step-by-step explanation:
The first thing we must do is replace y = 1 in the equation and clear the value of x:
1 = 7.5x
Clearing x:
x = 1 / 7.5 = 0.13 h
Then, you should keep in mind the following conversion:
1h = 60min
x = (0.13) (h) * (60/1) (min / h) = 7.8 min
answer:
It will take 7.8 minutes to travel 1 mile
Answer:
0.6 = 60% probability that it is either sunny or rainy.
Step-by-step explanation:
We solve this question treating these events as Venn probabilities.
I am going to say that:
Event A: Rain
Event B: Sun
The chance of rain is 20%
This means that 
The chance of it being sunny is 60%
This means that 
The chance of it being sunny and rainy at the same time is 10%.
This means that 
Calculate, the probability that it is either sunny or rainy.
This is:

0.6 = 60% probability that it is either sunny or rainy.