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
ad-work [718]
3 years ago
12

Pleaseeeee help There was a sample of 200 mg of radioactive substance to start a study. Since then, the sample has decayed by 4.

4% each year. Let T be the number of years since the start of the study. Let Y be the mass of the sample in mg's. Write and exponential function showing the relationship between Y and T
Mathematics
1 answer:
m_a_m_a [10]3 years ago
8 0
Y=200 (1-0.044)^t
.................
You might be interested in
Which statement is true of triangles FGH and JKL?
Mars2501 [29]

Answer:

They are similar because their corresponding angles are congruent and their corresponding sides are proportional in length.

Step-by-step explanation:

From the statements,

∠G≅∠K

∠F≅∠J

∠H≅∠L

The sides of triangle FGH are proportional to those of triangle JKL

FG/JK =GH/KL=FH/JL =1/2

6 0
3 years ago
Read 2 more answers
The cosine of 23° is equivalent to the sine of what angle
Archy [21]

Answer:

So 67 degrees is one value that we can take the sine of such that is equal to cos(23 degrees).

(There are more values since we can go around the circle from 67 degrees numerous times.)

Step-by-step explanation:

You can use a co-function identity.

The co-function of sine is cosine just like the co-function of cosine is sine.

Notice that cosine is co-(sine).

Anyways co-functions have this identity:

\cos(90^\circ-x)=\sin(x)

or

\sin(90^\circ-x)=\cos(x)

You can prove those drawing a right triangle.

I drew a triangle in my picture just so I can have something to reference proving both of the identities I just wrote:

The sum of the angles is 180.

So 90+x+(missing angle)=180.

Let's solve for the missing angle.

Subtract 90 on both sides:

x+(missing angle)=90

Subtract x on both sides:

(missing angle)=90-x.

So the missing angle has measurement (90-x).

So cos(90-x)=a/c

and sin(x)=a/c.

Since cos(90-x) and sin(x) have the same value of a/c, then one can conclude that cos(90-x)=sin(x).

We can do this also for cos(x) and sin(90-x).

cos(x)=b/c

sin(90-x)=b/c

This means sin(90-x)=cos(x).

So back to the problem:

cos(23)=sin(90-23)

cos(23)=sin(67)

So 67 degrees is one value that we can take the sine of such that is equal to cos(23 degrees).

6 0
3 years ago
Any help would be great
nadya68 [22]

Answer:

15

Step-by-step explanation:

38=10+13+c

c=38-10-13=15

Hope this helps!

8 0
3 years ago
Paula walked on the treadmill for 12 minutes. The machine told her she had a total of 780 strides. What was her rate in strides
Cerrena [4.2K]

Answer:780/12=65

Step-by-step explanation:

7 0
3 years ago
4 - 7x=39 find the value of x +1
wel
4-7x= 39

Subtract 4 from both sides
-7x= 35

Divide both sides by -7
x= -5

The value of x+1= (-5)+1= -4.
3 0
3 years ago
Other questions:
  • Which is an equation of the line with a slope of (1,4) and a y-intercept of-2​
    14·1 answer
  • Round 754 to the nearest ten
    12·1 answer
  • Maggie is x years old. Her brother Demarco is 4 years older than her. Anna is 3 times as old as Demarco. Write and simplify an e
    7·1 answer
  • Ryan runs 9 miles in 73 minutes. How many minutes does he take per mile?
    10·1 answer
  • There are 9 men and 33 women running a race. What is the ratio of the number of male runners to the number of female runners?
    7·1 answer
  • Rewrite 2x^2+6x-8 and x+3 in standard form
    5·1 answer
  • 30 POINTS FOR WHO EVER GIVE ME THE RIGHT ANSWER
    9·2 answers
  • Please help answer this question
    5·2 answers
  • Janelle earns $12 per hour. What equation can be used to find how many hours Janelle worked if she earned $360?
    8·1 answer
  • Perform the indicated operation. Be sure the answer is reduced.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!