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
katrin [286]
3 years ago
7

If 8 g of a radioactive substance are present initially and 2 yr later only 4 g remain, how much of the substance will be presen

t after 5 yrs?
Mathematics
1 answer:
My name is Ann [436]3 years ago
7 0

Answer:

none

Step-by-step explanation:

8-4=4

if every 2 years, 4 gallons disappear

then every 1 year, 2 gallons disappear

meaning that by 5 years there will be no substance left.

(5*2=10)

You might be interested in
As an estimation we are told £3 is €4.
andreev551 [17]

Answer:

68.48 pounds

Step-by-step explanation:

€91.30  to pounds

€91.30  * (3 pounds/ 4€) = 68.475 pounds  about  68.48 pounds

3 0
3 years ago
Find the equation of a line passing through the point (-4,1) and perpendicular to the
n200080 [17]

Answer:

A. y=-1/4x

Step-by-step explanation:

We have the information 3y=12x-9, the lines are perpendicular, and the new line passes through (-4,1). First, you want to put the original equation into slope intercept form by isolating the y, to do this we need to divide everything by 3 to get y=4x-3. The slopes of perpendicular lines are negative reciprocals so you need to find the negative reciprocal of 4, so flip it to 1/4 and multiply by -1, we get the slope of the new line as -1/4. So far we have the equation y=-1/4x+b. We are given a point on the line, (-4,1), we can plug these into the equation as x and y to solve for the y-intercept, b. You set it up as 1=-1/4(-4)+b. First you multiply to get 1=1+b, then you subtract 1 from both sides to isolate the variable and you get b=0. Then you can use b to complete your equation with y=-1/4x, or letter A.

6 0
3 years ago
The reciprocal of -21
Alex_Xolod [135]
1
- -----
21

(Minus one over 21)
8 0
3 years ago
Read 2 more answers
Can you help me with this please??
Ket [755]

Answer:

.8

Step-by-step explanation:

.8 is the largest

4 0
3 years ago
5x – 24 &gt; 26 <br> what is the solution to the inequality?
ozzi

Answer:

x > 10

Step-by-step explanation:

5x - 24 > 26

Add 24 on both sides.

5x -24 + 24 > 26 + 24

5x > 50

Divide by 5 on both sides.

x > 50 ÷ 5

Find x.

x > 10

6 0
3 years ago
Other questions:
  • 11:
    7·1 answer
  • If five squares, each with sides equal to 4n, are divided into 4 equal squares as shown, what will be of the sum of the perimete
    12·1 answer
  • PLEASE HELP ME ASAP
    13·1 answer
  • PLEASE HELLLLLLP!!!!!!!
    10·2 answers
  • videl watched 6 times as many hours of television over the weekend as dineen. Together they watched a total of 14 hours of telev
    6·1 answer
  • In a survey of 3,500 people who owned a certain type of​ car, 1,225 said they would buy that type of car again. What percent of
    5·1 answer
  • Please answer correctly! I will mark you as Brainleist!
    13·1 answer
  • Find the x-intercept and y-intercept of the line. -3x+6y=11
    8·1 answer
  • 1 point
    9·1 answer
  • margaret drove to a business appointment at 70 mph. her average speed on the return trip was 60 mph. the return trip took 1 6 hr
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!