3 years ago

1.

Mathematics

1 answer:

Olegator [25]3 years ago

7 0

Hope this helps somewhat

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A 18 gram sample of a substance that's used to detect explosives has a k value of0.125

mr Goodwill [35]

T1/2 = ln 2 / k = ln 2 / 0.125 = 5.5

4 0

3 years ago

Evaluate the permutation P(36,19)=____

kondaur [170]

Easy

nPr= $\frac{n!}{(n-r)!}$
here
36P19= $\frac{36!}{(36-19)!}=$
$\frac{36!}{(17)!}=$
$\frac{36*35*34*33*32*31*30*29*28*27*26*25*24*23*22*21*20*19*18}{1}=$
1045843337171591729971200000

6 0

3 years ago

HALP me please, mathematics

malfutka [58]

X=7 (let me know if you would like to know how I got the answer)

3 0

3 years ago

ef gh A. dº + fº = 180° B. gº + fº = C. Cº + f 0 = 180° D. bº + 0 = The circumference of a circle is 88c Calculat

Solnce55 [7]

About 28cm

circumference of a circle =radius×3.14

3.14÷circumference of the circle (88cm)=28.04.

About 28cm.

8 0

3 years ago

phil's age is 7 years more than 1/5 times peter's age.also,4 times phil's age is 2 years less than twice peter's age .if x is pe

bearhunter [10]

Let Peters age be x
Phil's age is 1/5x+7---------------------------(i)
Phil's age can also be calculated as
4(1/5x+7)=2x-2--------------------------------(ii)
So,
4/5x+28=2x-2
28+2=2x-4/5x
30=10/5x-4/5x
30=6/5x
x=30* $\frac{5}{6}$
x=25

5 0

3 years ago

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