Please help meeeeeeeeeee

I have 3 slots left and 3 answers left. Fill them in pls and u get a brainlist :)

gulaghasi [49]

Answer:

Water (one oxygen atom bonded to two hydrogen atoms)

Step-by-step explanation:

The chemical formula for water is H²O. The H is the chemical symbol for Hydrogen and O is the chemical symbol for Oxygen. The 2 is a subscript which represents how many atoms of a certain element are in a molecule. In this case, the subscript ² comes after H, indicating that there are two Hydrogen atoms inside water. There is no subscript after O, meaning there is only one Oxygen atom. Therefore, there are two Hydrogen atoms and one Oxygen atom that bond to form water. Hope this helps :))

4 0

3 years ago

At a certain coffee shop, all the customers buy a cup of coffee and some also buy a doughnut. The shop owner believes that the n

wolverine [178]

Answer:

(1) The probability that the shop owner sells over 2000 cups of coffee in a week is 0.2514.

(2) The shop owner has no reasonable chance to expect earning a profit more than $300.

(3) The probability that the shop owner will sell a doughnut to more than half of his coffee customers is 0.2611.

Step-by-step explanation:

Let X = number of cups of coffee sold and Y = number of donuts sold.

The random variable X follows a Normal distribution with parameters μ = 320 and σ = 20.

The random variable Y follows a Normal distribution with parameters μ = 150 and σ = 12.

The shop owner opens the shop 6 days a week.

(1)

Compute the probability that the shop owner sells over 2000 cups of coffee in a week as follows:

$P(X>2000)=P(\frac{X-\mu}{\sigma}>\frac{2000-(6\times320)}{6\times20})\\=P(Z>0.67)\\=1-P(Z$

Thus, the probability that the shop owner sells over 2000 cups of coffee in a week is 0.2514.

(2)

The equation representing the profit earned on selling 1 cup of coffee and 1 doughnut in a day is:

P = 0.5X + 0.4Y

Compute the probability that the shop owner earns more than $300 as profit as follows:

$P(Profit>300)=P(\frac{Profit-\mu}{\sigma}>\frac{300-((0.5\times320)+(0.4\times150))}{\sqrt{0.5^{2}(20)^{2}+0.4^{2}(12)^{2}}})\\=P(Z>7.21)\\\approx0$

The probability of earning a profit more then $300 is approximately 0.

Thus, the shop owner has no reasonable chance to expect earning a profit more than $300.

(3)

The expression representing the statement "he'll sell a doughnut to more than half of his coffee customers" is:

Y > 0.5X

Y - 0.5X > 0

Compute the probability of the event (Y - 0.5X > 0) as follows:

$P(Y - 0.5X > 0)=P(\frac{(Y - 0.5X) -\mu}{\sigma}>\frac{0-(150-(0.5\times320}{\sqrt{12^{2}+0.5^{2}20^{2}}})\\=P(Z>0.64)\\=1-P(Z$

Thus, the probability that the shop owner will sell a doughnut to more than half of his coffee customers is 0.2611.

8 0

3 years ago

Finish the table and write the equation

12345 [234]

Answer:

29

Step-by-step explanation:

Each number has 4 in difference

7 0

3 years ago

Read 2 more answers

Three brothers share 2 sandwiches equally. How much of a sandwich does each brother get?

kykrilka [37]

Answer: Each brother will get 1 and 1/2 of the 2 sandwiches

Step-by-step explanation: Convert 3/2 into a mixed number

7 0

4 years ago

True or False ,. . The slope of a line will depend on which of the two points you choose to call (x1, y1) and which you choose t

Sophie [7]

False

lets say u have 2 sets of points (1,2) , (3,4)
now lets say (1,2) is (x1,y1) and (3,4) is (x2,y2)
slope = (y2 - y1) / (x2 - x1)
slope = (4-2) / (3-1) = 2/2 = 1

now, lets say (1,2) is (x2,y2) and (3,4) is (x1,y1)
slope = (y2 - y1) / (x2 - x1)
slope = (2 - 4) / (1 - 3) = -2/-2 = 1

in conclusion, the naming of the points will not effect the slope

6 0

3 years ago

Read 2 more answers