1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ValentinkaMS [17]
2 years ago
12

Pls answer clearly , just the answer i dont need explenation:) please <3

Mathematics
1 answer:
lawyer [7]2 years ago
5 0

Answer:

option D

Step-by-step explanation:

You might be interested in
Jessica had $115 to spend on 9 books. After buying them, she had 16 dollars. How much did each book cost
bazaltina [42]

Answer:

$11.00

Step-by-step explanation:

$115.00 - $16.00= $99.00 /9= $11.00

8 0
3 years ago
2.The number of grams A of a certain radioactive substance present at time, in yearsfrom the present, t is given by the formulaA
professor190 [17]

Answer:

Given that,

The number of grams A of a certain radioactive substance present at time, in years

from the present, t is given by the formula

A=45e^{-0.0045(t)}

a) To find the initial amount of this substance

At t=0, we get

A=45e^{-0.0045(0)}A=45e^0

We know that e^0=1 ( anything to the power zero is 1)

we get,

A=45

The initial amount of the substance is 45 grams

b)To find thehalf-life of this substance

To find t when the substance becames half the amount.

A=45/2

Substitute this we get,

\frac{45}{2}=45e^{-0.0045(t)}

\frac{1}{2}=e^{-0.0045(t)}

Taking natural logarithm on both sides we get,

\ln (\frac{1}{2})=-0.0045(t)^{}(-1)\ln (\frac{1}{2})=0.0045(t)\ln (\frac{1}{2})^{-1}=0.0045(t)\ln (2)=0.0045(t)0.6931=0.0045(t)t=\frac{0.6931}{0.0045}t=154.02

Half-life of this substance is 154.02

c) To find the amount of substance will be present around in 2500 years

Put t=2500

we get,

A=45e^{-0.0045(2500)}A=45e^{-11.25}A=45\times0.000013=0.000585A=0.000585

The amount of substance will be present around in 2500 years is 0.000585 grams

4 0
1 year ago
Image attached on the bottom
julia-pushkina [17]

Answer:

c

Step-by-step explanation:

i just took it

5 0
3 years ago
Read 2 more answers
A fair, unbiased coin was flipped 10 times, giving the results shown in the table, where T = tails and H = heads.
lakkis [162]

Answer:

0.3

Step-by-step explanation:

another person put that and everybody scored him 5 stars so im pretty sure its 0.3 for Plato users

8 0
3 years ago
Read 2 more answers
How do you multiply fractions with cross canceling&lt;br /&gt;
AVprozaik [17]
3 9
_ * _
15 6

Compare diagonally to see if they the 2 numbers simplify.

Ex:

3 and 6 Simplify to 1 and 2 because they are both multiples of 3.

9 and 15 Simplify to 3 and 5 because they are both multiples of 3 as well.

Now our fractions are

1 3
_ * _
5 2

Now multiply across to get your final fraction/answer

3
_
10
5 0
3 years ago
Other questions:
  • Naomi lives 5 1/2 blocks north of school. Marco lives 8 blocks north of school. How far does Naomi live from Marco
    6·1 answer
  • Can any one slove this
    13·1 answer
  • How do I write a fraction that is greater than 1/2 and less then 3/4?
    14·1 answer
  • Proportion Application
    5·1 answer
  • A car dealer paid a certain price for a car and marked it up byt 7/5 of the price he paid. Later he sold it for 24000. What is t
    8·1 answer
  • Solve: <img src="https://tex.z-dn.net/?f=cos%5E2%282x%29-sin%5E2%282x%29%3D0" id="TexFormula1" title="cos^2(2x)-sin^2(2x)=0" alt
    9·1 answer
  • 1.What is the shape of the graph of any quadratic function?
    12·1 answer
  • True or False It is never sensible to calculate more than 100% of a number.​
    7·1 answer
  • The length of a rectangle is 4yd longer than its width. If the perimeter of the rectangle is 72yd, find its length and width.
    7·1 answer
  • 30 POINTS FOR ONE QUESTION!!!!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!