Be right there! Let's do this!
Answer:
a) 0.2
b) 0.2
c) 0.5
Step-by-step explanation:
Let
be the event "the car stops at the signal.
In the attached figure you can see a tree describing all possible scenarios.
For the first question the red path describes stopping at the first light but not stopping at the second. We can determine the probability of this path happening by multiplying the probabilities on the branches of the tree, thus

For the second one the blue path describes the situation

For the las situation the sum of the two green path will give us the answer

Let's write 3:5 = 3k:5k. Then using perimeter formula, we can write that

and k=5 cm. The sides are 15 cm and 25 cm. The area is
Answer:
Add all the average amounts of items in each bag and you should get 23. Then, divide it by 3 since you are working with 3 numbers.
Answers for different places you have to round to:
Ones: 8
Tenths: 7.7
Hundredths: 7.67
Thousandths: 7.667