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3 years ago

What is the ratio of 7 hours and 4 lawns.

2 answers:

7 0

The ration for lawns to hours is 4 lawns :7 hours simplified to .57 lawns :1hour or 7 hours :4 lawns simplified to 1.75 hours:1 lawn

A ratio is a number compared to another for example

2 eyes:1 human
7 days:1 week

It's usually simplified to have the right number 1 so you can see how many 1 of the right is in relation to the left. To simply you can just divide the 2 #s like a fraction

grigory [225]3 years ago

5 0

4/7 duh trust meh ok

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I need help please!!! My teacher doesn't teacher and she has asked us to do a problem I don't know how to do it. Can somebody ex

ra1l [238]

Using exponential functions, it is found that:

a) Since the amount of caffeine will be less than 50 mg, the patient will be ready for the blood test by 6 a.m.

b) The patient could have ingest 231 milligrams of caffeine.

A decaying exponential function is modeled by:

$A(t) = A(0)(1 - r)^t$

In which:

A(0) is the initial value.
r is the decay rate, as a decimal.

In this problem:

Caffeine metabolize at a rate of 13% per hour, hence $r = 0.13$ .

Then:

$A(t) = A(0)(1 - r)^t$

$A(t) = A(0)(1 - 0.13)^t$

$A(t) = A(0)(0.87)^t$

Item a:

The coffee cup contains 150 milligrams of caffeine, hence $A(0) = 150$ .

At 6 a.m., it is 8 hours after drinking the coffee, hence we have to find A(8).

$A(t) = A(0)(0.87)^t$

$A(8) = 150(0.87)^8$

$A(8) = 49.2$

Since the amount of caffeine will be less than 50 mg, the patient will be ready for the blood test by 6 a.m.

Item b:

This A(0), considering A(11) = 50, hence:

$50 = A(0)(0.87)^{11}$

$A(0) = \frac{50}{(0.87)^{11}}$

$A(0) = 231$

The patient could have ingest 231 milligrams of caffeine.

A similar problem is given at brainly.com/question/25537936

3 0

2 years ago

You stopped on your way to basketball practice and bought four cans of fruit punch for $0.69 each. How much did you spend in all

blondinia [14]

Answer:

0.69 x 4= $2.76

Step-by-step explanation:

4 0

3 years ago

Solve 2x2 + 20x = −38.

cestrela7 [59]

2x^2+20x=-38 divide both sides by 2

x^2+10x=-19, halve the linear coefficient, square it, than add that value to both sides of the equation, in this case add (10/2)^2=25...

x^2+10x+25=6 now the left side is a perfect square

(x+5)^2=6 take the square root of both sides

x+5=±√6 subtract 5 from both sides

x=-5±√6 (so answer c.)

4 0

3 years ago

Use log 3 = .477 and log 6 =.778 to approximate the expression. log 2

Fed [463]

Answer:

0.301

Step-by-step explanation:

Given that log 3 = .477 and log 6 =.778

Log 2

= log(6/3)

= log 6 - log 3

= 0.778 - 0.477

= 0.301

Hence the value of log 2 is 0.301

3 0

3 years ago

Wjat is the answer for this equation

mina [271]

Answer: 22

17 1/2= 17.5

4 1/2= 4.5

17.5 + 4.5 = 22

6 0

3 years ago

Read 2 more answers