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3 years ago

Plz help me i dont even know how to start this can u also explain how to do it much appretciated

Mathematics

1 answer:

Sergeu [11.5K]3 years ago

4 0

Ok did your teacher say anything about not being able to use negative numbers or fractions? If not can you use fractions or negative numbers.

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A patient is given a 100-milligram dosage of a drug that decays exponentially at a rate of 11% per hour. The doctor wants to kno

I am Lyosha [343]

Answer:

This is an example of exponential decay (somewhat similar to half-life).

If it decays at 11% per hour we can calculate its half-life by this formula:

half life = [ time • ln (2) ] ÷ ln (beginning amount ÷ ending amount)

where "ln" means natural log

half life =[ 1 hour * .69315] / ln (100 / 89)

half life =[.69315] / ln (1.1235955056)

half life =[.69315] / 0.11653381624

half life = 5.9481 hours

We need "lambda" "λ" (the decay constant) which equals

λ = ln(2) / half-life = .693147 / 5.9481 = 0.1165325062

Now we need a formula for the time required:

time = ln (Nt ÷ N0) ÷ -λ where No = beginning amount (100 milligrams) Nt = ending amount (15 milligrams)

time = ln (15 ÷ 100) ÷ -0.1165325062

time = ln (.15) / -0.1165325062

time = -1.8971199849 / -0.1165325062

time = 16.2797492885 hours

Source: https://www.1728.org/halflif2.htm

Step-by-step explanation:

4 0

3 years ago

Classify the following triangle as acute, obtuse, or right.

gtnhenbr [62]

Answer: Right

Hoped this help you

3 0

3 years ago

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Jackie bougth red and green binders and paid $2.25 for each red binder and $3.24 for each green binder and spent a total of $21.

Alenkasestr [34]

Answer:

4 each of red and green binders.

Step-by-step explanation:

Given: Price of each red binder is $2.25.

Price of each green binder is $3.24.

Total Jackie paid is $21.96.

Lets assume the number of red binder bought be "x".

∴ Total amount paid for red binder= $number\ of\ red\ binder \times price\ for\ each\ red\ binder$

⇒ Total amount paid for red binder= $x\times \$ 2.25= \$ 2.25x$

Now, finding the amount paid for green binder.

As we know the total amount paid by Jackie is $21.96 and she bought same number for each binder.

Jackie paid for x number of green binder= $\$ 3.24\times x= \$ 3.24x$

Next, we can write an equation on total amount paid for Green binder to find value of x.

∴ $\$ 21.96-\$ 2.25x= \$ 3.24x$

Solving the equation.

$\$ 21.96-\$ 2.25x= \$ 3.24x$

Adding both side by \$ 2.25x

⇒ $\$ 21.96= \$ 3.24x+\$ 2.25x$

⇒ $\$ 5.49x = \$ 21.96$

cross multiplying both side.

⇒ $x= \frac{21.96}{5.49} = 4$

∴ x= 4

Hence, Jackie bought 4 each of red and green binders as she bought same number of each binders.

7 0

3 years ago

Each car on a Ferris wheel travels 942.5 ft during 10 rotations of each ride. How high is each car at the highest point of each

Mumz [18]

Answer:

94.25 feet

Step-by-step explanation:

we can use the formula for the circumference of the circle to determine the diameter of the ferris wheel.

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3 years ago

Solve for r. - 17 +r = 42

Vaselesa [24]

Answer:

R = 25

Step-by-step explanation:

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3 years ago

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