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Lelu [443]
3 years ago
14

There are 400 students at Washington Middle School, and 100 of them are in sixth grade. What percent of the students are in sixt

h grade?
Pick the model that represents the problem.

Mathematics
1 answer:
Bogdan [553]3 years ago
7 0

Answer:

25%

Step-by-step explanation:

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The number of milligrams Dh of a drug in a patient's bloodstream h hours after the drug is injected is modeled by the following
hodyreva [135]

We assume you intend

D(h)=35e^{-0.15h}

You want to evaluate this function for h=0 and h=8.

D(0)=35e^{0}=35\\D(8)=35e^{-0.15\cdot 8}\approx 10.54

The amount injected was 35 milligrams; 8 hours later 10.54 milligrams remained.

4 0
3 years ago
A bluebird is sitting in her nest 10 feet up in a tree when she looks down and sees a cat and a worm. she decides to use math to
GarryVolchara [31]

Answer:

12.2 feet

Step-by-step explanation:

The key to this problem is trigonometry.

Imagine a right triangle. With a height, 10 ft (representing the tree's height), and a base of 7 ft (representing the horizontal distance to the worm).

Now the hypoteneuse length, or otherwise the distance from the worm is unknown.

So this is where we can use the pythagorean theorem.

a^2 + b^2 = c^2

c here is the hypoteneuse length, and a and b are the other lengths of the triangle.

Since we know a and b we can solve for c.

But first we will square root both sides of the equation to get c and not  c^2.

\sqrt{a^2 + b^2} = c

Now just plug in our values for a and b respectively. (It doesn't matter what number replaces a or b, just make sure you are replacing a and b with the 2 known values) Calculate.

\sqrt{10^2 + 7^2} = \sqrt{100 + 49} = \sqrt{149} = 12.206....

Round to the nearest tenth.

12.2 feet

7 0
3 years ago
Correct option*<br> PLEASE HELP I WILL GIVE BRAINLIEST
Kryger [21]

Answer:

The answer is A

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Help me plz i need it
Leviafan [203]
X=17 is the awnser for this
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3 years ago
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Solve the following quadratic equation using the quadratic formula. 6x² +7x - 11 = 0
Black_prince [1.1K]
Only difference your example has 11 and here it's ten
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3 0
3 years ago
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