Look at the question above.please help me on 3a and 3b

Answers

Answer 1

Answer: on 3a- its asking you to find out how fast the lava is flowing and simplifying it so much that the denominator is one. If its 0.9 in 3 seconds, how much is it in 1 second.
I'm not sure about 3b- what does (l,r) mean?
Hope this helped

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if one base of a trapizoid is 7.2 inches and the other base is 6.4 and the hieght is 3.6 what is it all around

Answers

If the base is 7.2 and the top is 6.4, you know that the extra bit on the bottom is (7.2 - 6.4 =) 0.8. This means on each side the base of the imaginary triangle is 0.4

Using Pythagoras' theorem, we know a² + b² = c²

0.4² + 3.6² = c²
c = √0.16 +12.96
c = √13.12
c = 3.62 -> this is the diagonal length of one of the sides of the shape.

So the distance all around is 7.2 + 6.4 + 3.62 + 3.62 = 20.84 inches

At 8am the temperature was 56 degrees fahrenheit. by noon a storm had arrived, and the temperature was 43 degrees fahrenheit. which describes the change in temperature from 8 am until noon PLEASE HELP. THANK YOU VERY MUCH FOR ANYONE WHO HELPS.

Answers

56-43 = 13

12-8 = 4

13/4 = 3.25

The temperature decreased 3.25 each hour.

Hope I helped! (Pick my answer as brainliest!)

21 fewer stars than 3 times a number H

Answers

You get the expression;
3H-21
Hope this helps.

Factorise:b+√b-12
An easy one.

Answers

Answer:

Step-by-step explanation:

If you let b = x^2 the problem becomes a whole lot easier. Note that x = √b

x^2 + x - 12

Now factor this trinomial.

(x + 4)(x - 3)

Now put b back into the equation

(√b + 4)(√b - 3)

What does P(B/A) represent?

Answers

Answer:

Choice D

Step-by-step explanation:

probability of B given A

given you win the first race, you win the second race

Answer: The correct option is

(D) The probability that you win the second race given that you win the first race.

Step-by-step explanation: We are given the following two events :

A : You win the first race

B : You win the second race.

We are given to select the statement that represents P(B\A).

We know that

for any two events R and Q, the probability P(Q\R) represents the probability of happening of event Q given that the event R has already happened.

Therefore, for the given two events A and B,

the probability P(B\A) represents the probability that you win the second race given that you win the first race.

Thus, (D) is the correct option.

Which of the following expression is exponential form: 1.6 x 1.6 x 1.6 x 1.6.A) 4^1.6
B) 1.6^4
C) 1.6 x 4
D) 1.6 + 4

Answers

i think that it is b

b) 1.6^4 1.6 is being multiplied 4 times

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Which one is smaller; 0.0175, 0.65, or 0.876

14% of what number is 7

How do you find the x-coordinate of the vertex of a parabola if you only have the equation