Hi Sushbis, yes you are right. It should be the same time and from the same point

Got it thanks! Could you also solve this without using the constant K? It cancels anyway...

Rate of change

The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of chemical B present. If the concentration of chemical B is increased by 100 percent, which of the following is closest to the pe...

rakes

A certain business produced x rakes each month from november to february and shipped x/2 at the rakes beginning of each month from march through october. The business paid no storage costs for the rakes from november through february, but it paid storage costs of 0.10 dollars / rake for each month m...

K

if K is a positive 3-digit integer, what is the hundreds digit of K?

1. the hundreds digit of K+150 is 4.
2. the tens digit of K+25 is 7.

E

number line

if n denotes a number to the left of 0 on the number line such that the square of n is less than 1/100, then the reciprocal of n must be

a. less than -10
b. between -1 and -1/10
c. between -1/10 and 0
d. between 0 and 1/10
e. greater than 10

A

stamps

the number of stamps that kaye and alberto had were in the ratio 5:3. after kaye gave alberto 10 stamps the ratio that kaye had to the number alberto had was 7:5. as a result of the gift, kaye had how many more stamps than Alberto?

A. 20
B. 30
C. 40
D. 60
E. 90

C

ratio

if m,r,x and y are positive, is the ratio of m to r equal to the ratio of x to y?

1. ratio of m to y is equal to ratio of x to r.

2. ratio of m+x to r+y is equal to ratio of x to y.

B