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NeTakaya
3 years ago
6

Robin rolled a die and then flipped a coin. What is the probability she rolled an even number and the coin landed on heads?

Mathematics
1 answer:
aleksandr82 [10.1K]3 years ago
4 0

Answer:

1/4

Step-by-step explanation:

There are 3 even numbers of the 6 numbers on a die.

(1,2,3,4,5,6) are the possible numbers.  2,4,6 are even

P( even number ) = 3/6 = 1/2

P (heads) = 1/2

Since they are independent events, we can multiply the probabilities together

P (even, heads) = 1/2 * 1/2 = 1/4

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30% of doctors on a hospital are female. if there are 780 doctors altogether, how many doctors are female ? round to the nearest
Archy [21]
30% as a decimal is 0.3

Multiply 780 by 0.3
780(0.3)=234 female doctors
4 0
3 years ago
Read 2 more answers
Surface Area of the pyramid
hichkok12 [17]

Answer:

C

Step-by-step explanation:

the total surface area of such a pyramid is the sum of 5 areas :

1 bottom square (8×8)

4 side triangles

the area of a triangle is

baseline × height / 2

now, we know the baseline of the 4 triangles, but what is their height (at least we know, all 4 have the same height, as the pyramid is totally regular) ?

the height of the side triangles is the slant height of the pyramid (the distance from the middle of a sideline to the top of the pyramid).

we get this by imagining a right-angled triangle inside the pyramid :

one leg is the inner height of the pyramid.

the second leg is the connection on the bottom square from the base of the inner height to the middle point of a sideline). this is half the length of a sideline.

and the baseline (Hypotenuse) is the slant height of the pyramid.

we can use Pythagoras

c² = a² + b²

with c being the Hypotenuse (side opposite of the 90° angle).

slant height² = 7² + (8/2)² = 49 + 4² = 49 + 16 = 65

slant height = sqrt(65) = 8.062257748... in

so, we get a areas

bottom square = 8×8 = 64 in²

a side triangle = 8×sqrt(65)/2 = 4×sqrt(65) =

= 32.24903099... in²

all 4 side triangles = 4×32.24903099... =

= 128.996124... in²

and we get as total surface area

64 + 128.996124... = 192.996124... in² ≈ 193.00 in²

8 0
1 year ago
I need help!! thanks. Will crown.
Ymorist [56]

Answer:

d(10)=20?

Step-by-step explanation:

Hope it helps

can i have the crown(brainliest)?

6 0
2 years ago
HELP WHATS THE CONSTANT OF PROPORTIONALITY<br> sodas: 2 3 4 5 <br> cost: $2.50 $3.75 $5.00 $6.25
musickatia [10]

Answer:

its 1.25

Step-by-step explanation:

3 0
3 years ago
Perry bought one package of strawberries for $3. How many packages of strawberries can Mei buy if she has $9?
evablogger [386]

Answer:

3 packs

Step-by-step explanation:

1 pack = $3

To see how many she could buy divide the money she has by how much each pack costs

9/3 = 3

$3 for each pack is the same as

3+3+3 = 6+3 = 9

7 0
2 years ago
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