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3 years ago

There are 6 numbers on a normal die. What is the probability that if you roll a pair of dice, you'll get the sum of 20?

Mathematics

2 answers:

hjlf3 years ago

4 0

P(6)=15 Possibilities to reach six. But that multiplied by a x=20 sum is 1/100.

liq [111]3 years ago

3 0

1/6 because you roll the die witch mean it ill land on one side and add them

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A long distance runner starts a race at 1 m/s. he increases his speed to 3 m/s during the middle of the race and slows down to 2

slavikrds [6]

The answer is 2000:720~2.778 m/s

6 0

3 years ago

A biologist recorded a count of 337 bacteria present in a culture after 5 minutes and 699 bacteria present after 15 minutes.

hoa [83]

The initial population was 234.

Explanation

Formula for the exponential growth is: $A= P*e^r^t$ , where P is the initial amount, A is the final amount, r is the rate of growth and t is the time duration.

There was 337 bacteria after 5 minutes and 699 bacteria after 15 minutes. So, the equations will be......

$337=P*e^5^r .................................. (1)\\ \\ 699=P*e^1^5^r ................................. (2)$

Now dividing equation (2) by equation (1) , we will get .......

$\frac{699}{337}=\frac{e^1^5^r}{e^5^r} \\ \\ e^1^0^r = \frac{699}{337}$

Taking 'natural log' on both sides.........

$ln (e^1^0^r) = ln (\frac{699}{337})\\ \\ 10r= 0.7295....\\ \\ r= 0.07295.... \approx 0.073$

Now, plugging this $r=0.073$ into equation (1), we will get......

$337= P*e^5^(^0^.^0^7^3^)\\ \\ 337= P*1.4405 \\ \\ P= 233.946 \approx 234$

So, the initial population was 234.

7 0

3 years ago

Y= 5x2+ 10x - 2 A = opens= vertex=

natka813 [3]

Axis of symmetry: x= -1
Vertex: (-1 , -7)
Opens Up
No asymptotes

6 0

3 years ago

76% of 524 is what number

serg [7]

398.24

76 x 524/ 100

= 398.24

Hope this helps :) have a great day/ night!!!!!!

8 0

4 years ago

PLEASE HELP ME on this

Soloha48 [4]

Answer:

Step-by-step explanation:

4 0

3 years ago