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
timama [110]
3 years ago
13

kate has a coin collection she keeps 7 of the coins in a box which is only 5% of her entire collection what is the total number

of coins in kates coin collection
Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
7 0

Answer:

140

Step-by-step explanation:

so where trying to find the unknown total of coins so where gonna call that x

then we will make an equation 5% * x= 7

then to make it easier to solve we will convert 5% to a decimal   .05

and finally to find the answer we will divide both sides by .05

this gives us x= 140 which is the answer

You might be interested in
NEED HELP ASAP!!!!!!!
Elan Coil [88]
I think the answer is C
3 0
3 years ago
Help ill give brainlest pls
Murrr4er [49]

Answer:

D

Step-by-step explanation:

Label the coordinate plane with the numbers so you can see it, you can also use a coordinate plane from online for a reference

8 0
2 years ago
a stock broker finds a bank stock that turns his $10000 investment into approximately $12000 in 2 years. over the two years what
PolarNik [594]

the your answer is 1000

4 0
3 years ago
Yooo can somebody help ill give you 10 or 22 points pls I need help!!!
dezoksy [38]

Answer:

The answer is 1475 have a nice day! <3

5 0
3 years ago
Read 2 more answers
The concentration of dichlorodiphenyltrichloroethane (DDT - an infamous pesticide) in Lake Michigan has been declining exponenti
mojhsa [17]

Answer: A) y=13e^{-0.1359t}

              B) H = 5.10

              C) Yes

Step-by-step explanation: <u>Exponential</u> <u>Decay</u> <u>function</u> is a model that describes the reducing of an amount by a constant rate over time. Generally, it is written in the form: y(t)=Ce^{rt}

A) C is initial quantity, in this case, the initial concentration of DDT. To determine r, using the data given:

y(t)=Ce^{rt}

2.22=13e^{13r}

e^{13r}=0.1708

Using a natural logarithm property called <em>power rule:</em>

13r=ln(0.1708)

r=\frac{ln(0.1708)}{13}

r=-0.1359

The decay function for concentration of DDT through the years is y(t)=13e^{-0.1359t}

B) The value of H is calculated by y=C(0.5)^{\frac{t}{H} }

2.22=13(0.5)^{\frac{13}{H} }

(0.5)^{\frac{13}{H} }=0.1708

Again, using power rule for logarithm:

\frac{13}{H} log(0.5)=log(0.1708)

\frac{13}{H} =\frac{log(0.1708)}{log(0.5)}

\frac{13}{H} =2.55

H = 5.10

Constant H in the half-life formula is H=5.10

C) Using model y(t)=13e^{-0.1359t} to determine concentration of DDT in 1995:

y(24)=13e^{-0.1359.24}

y(24) = 0.5

By 1995, the concentration of DDT is 0.5 ppm, so using this model is possible to reduce such amount and more of DDT.

8 0
2 years ago
Other questions:
  • Sherrell mowed 2/5 of the lawn and Trace power 1/3 of it. How much more of the lawn did Sherrell mow than Trace?
    15·1 answer
  • Find the other endpoint given the following <br><br><br> Endpoint: (5,-3) Midpoint: (7,-6)
    6·1 answer
  • The distance between city E and F is 678.35 miles and the distance between city F and G is 156.8 miles. What is the distance bet
    10·2 answers
  • 50 pts. <br><br> Solve this algebraic equation.<br><br> -6x + 5 + 12x -6
    13·2 answers
  • Maya drove to the mountains last weekend. There was heavy traffic on the way there, and the trip took 12 hours. When Maya drove
    15·1 answer
  • How can you determine is a math question is an equation or an expression?
    14·2 answers
  • The ratio of women to men in<br> Atlanta is 15:1, if there are 150 men<br> How many women?
    5·2 answers
  • A population of insects increases at a rate 230 + 8t + 0.9t2 insects per day (t in days). Find the insect population after 6 day
    13·1 answer
  • 3х – 8y = — 16<br> =<br> M<br> So yeah I kinda need help
    6·1 answer
  • Help Me in my Math Thanks :)​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!