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3 years ago

Harry has five a1 bills, three $ 10 bills, and

Mathematics

1 answer:

Flura [38]3 years ago

4 0

Answer:

$\frac{1}{45}$ chance to grab both $20 bills

Step-by-step explanation:

There are ten bills in total.

The probability that the first dollar she picks is a twenty-dollar bill is 2/10 because she can pick either of the two twenty-dollar bills out of the ten in her wallet. Next, we need to pick the second bill. There are nine bills left, and only one is a twenty-dollar bill. The probability of choosing a second dollar bill is 1/9.

(2/10)*(1/9)=2/90=1/45

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9. A ladder of length 23 feet leans against the side of a building. The angle of elevation of the ladder is 76. Find the distanc

irakobra [83]

<h3>Answer:</h3>

B) 22.32 feet

$\quad\rule{300pt}{1pt}$

<h3>Solution:</h3>

we are given that , a ladder is placed against a side of building , which forms a right angled triangle . We wre given one side of a right angled triangle ( hypotenuse ) as 23 feet and the angle of elevation as 76 ° . We can find the Perpendicular distance from the top of the ladder go to the ground by using the trigonometric identity:

$\qquad\quad\bull ~{\boxed{\bf{ Sin\theta =\dfrac{Perpendicular}{Hypotenuse}}} }~\bull$

Here,

hypotenuse = 23 feet
$\theta$ = 76°
Value of Sin $\theta$ = 0.97
Perpendicular = ?

$\quad\dashrightarrow\quad \sf { sin\theta =\dfrac{P}{H}}$

$\quad\dashrightarrow\quad \sf { sin76° =\dfrac{P}{23}}$

$\quad\dashrightarrow\quad \sf { 0.97=\dfrac{P}{23}}$

$\quad\dashrightarrow\quad \sf {P = 0.97 \times 23 }$

$\quad\dashrightarrow\quad \sf { P = 22.32}$

‎ㅤ‎ㅤ‎ㅤ~Hence, the distance from the top of the ladder to the ground is 22.32 feet !

$\rule{300pt}{2pt}$

4 0

3 years ago

Given the line 2x - 3y - 5 = 0, find the slope of a line that is perpendicular to this line.

mojhsa [17]

The Slope of "2x - 3y - 5 = 0" is:

m = 2/3.

Use the mx+y formula to solve this question.

The correct answer is: B

This is a verified answer.

3 0

3 years ago

Read 2 more answers

A gallon of milk weighs eight pounds, so you wouldn't try to carry three or four gallons home on your bicycle. gasoline is a bit

ipn [44]

600 gallons per year.
take the total amount of miles driven and divide by the miles per gallon to get the average gallons used per year. (the other information is meant to be a distractor.) 12000/20 = 600

5 0

4 years ago

Divide £52 in the ratio 11:2

True [87]

First, get the sum of the ratio. (11 + 2 = 13)

Divide 52 by 13 to find one 'part' of the ratio. (52 ÷ 13 = 4)

Now that we have one 'part' of the ratio, we multiply it by 11 and 2 to get: (£4 × 11 = £44) and (£4 × 2 = £8).

The ratio will be £44:8.

We can check if this is correct by adding 44 and 8 to see if it adds up to 52. (44 + 8 = 52). It does, so it's correct.

6 0

3 years ago

Compare- 6 broken bulbs out of 20 or 7 broken bulbs out of 30

9966 [12]

Answer:

well 6/20 has more absolute value than 7/30

Step-by-step explanation:

also 7/30 is closer to zero

5 0

4 years ago