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Natasha2012 [34]
2 years ago
6

A quantity with an initial value of 670 decays continuously at a rate of 25% per hour.

Mathematics
1 answer:
AysviL [449]2 years ago
4 0

Answer:

89.43

Step-by-step explanation:

a = 670 * (1 * .25)^7

a = 670 * (.75)^7

a = 89.43

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Here are 15 cards, numbered 1 through 15. if you pick a card, what is the probability that you choose an odd number or a two?
kondor19780726 [428]
9/15. There are 15 cards and 8 of them are odd and 1 is a 2. 
5 0
3 years ago
May I please receive help
skad [1K]

Answer:

  • 116°

Step-by-step explanation:

Angles 1 and 3 are same as vertical pair, they are also same with angles 5 and 7 for same reason.

<u>Angle 8 is supplementary with angle 5, so:</u>

m∠1 = m∠3 = m∠5 = 180° - 64° = 116°

6 0
3 years ago
Y=x^2+bx+c;(-2,3)
Maksim231197 [3]
<h3>Answer:  b = 4 and c = 7.</h3>

===============================================

Explanation:

Comparing y = x^2+bx+c to y = ax^2+bx+c, we see that a = 1.

The vertex given is (-2,3). In general, the vertex is (h,k). So h = -2 and k = 3.

Plug those three values into the vertex form below

y = a(x-h)^2 + k

y = 1(x-(-2))^2 + 3

y = (x+2)^2 + 3

Then expand everything out and simplify

y = x^2+4x+4 + 3

y = x^2+4x+7

We see that b = 4 and c = 7.

8 0
3 years ago
Complete the phrases below using the word bank.
oee [108]

Answer:

A- b: the y value when y changes; the point where a line crosses the v-axis

B- m: What happens to y when x is one; the ratio of the y change to the x change

C- k: The y value when x is zero b x increases by one

Step-by-step explanation:

If this is about slope intercept form as i think it is

C sounds a little bonkers in this case though because when y is zero then x increases by one

7 0
3 years ago
Both circle A and circle B have a central angle measuring 140°. The ratio of the radius of circle A to the radius of circle B is
beks73 [17]
Let 
rA--------> radius of the circle A
rB-------> radius of the circle B
LA------> <span>the length of the intercepted arc for circle A
</span>LB------> the length of the intercepted arc for circle B

we have that
rA/rB=2/3--------> rB/rA=3/2
LA=(3/4)<span>π
</span>
we know that
if <span>Both circle A and circle B have a central angle , the ratio of the radius of circle A to the radius of circle B is equals to the ratio of the length of circle A to the length of circle B
</span>rA/rB=LA/LB--------> LB=LA*rB/rA-----> [(3/4)π*3/2]----> 9/8π

the answer is
the length of the intercepted arc for circle B is 9/8π
3 0
3 years ago
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