Answer:
20
Step-by-step explanation:
hope this helps
7.<u>solution</u><u> </u>
v=4/3πr^3
=4/3π×6^3
=4/3×216cm^3π
=288cm^3π
8.<u>solution</u>
<u>SA</u><u>=</u><u>4</u><u>π</u><u>r</u><u>^</u><u>2</u>
<u>=</u><u>4</u><u>×</u><u>6</u><u>^</u><u>2</u><u>π</u>
<u>=</u><u>4</u><u>×</u><u>3</u><u>6</u><u>cm</u><u>^</u><u>2</u><u>π</u>
<u>=</u><u>1</u><u>4</u><u>4</u><u>cm</u><u>^</u><u>2</u><u>π</u>
Answer:
0.16%
Step-by-step explanation:
From the statement of the question;
Number of Laryngeal cancer due to smoking = 160
Population of smokers = 100,000
Hence the percentage of smokers liable to have Laryngeal cancer = 160/100000 ×100/1
=0.16%
Hence 0.16% of smokers are liable to Laryngeal cancer
Answer:
let the polynomial be
f(x)=x³+2kx+2
is divided by
g(x)=x+2
hence
(x+2) is a factor of f(x)
so comparing with x-a we get a=-2
so
f(a)=0
f(-2)=(-2)³+2*-2*k+2
0=-8-4K+2
4k=-6
K=-6/4
k=-3/2
again
when divided by x+1
g(x)=x+1
hence
x+1 is a factor
so a=-1
f(-1)=-(1)³+2*-1*k+2
0=-1-2k+2
0=1-2k
k=1/2
<u>T</u><u>h</u><u>e</u><u> </u><u>v</u><u>a</u><u>l</u><u>u</u><u>e</u><u> </u><u>o</u><u>f</u><u> </u><u>k</u><u> </u><u>i</u><u>s</u><u> </u><u>1</u><u>/</u><u>2</u><u> </u><u>when</u><u> </u><u>divided</u><u> </u><u>by</u><u> </u><u>x</u><u>+</u><u>1</u>
<u>and</u>
<u>K</u><u> </u><u>=</u><u>-</u><u>3</u><u>/</u><u>2</u><u> </u><u>w</u><u>h</u><u>e</u><u>n</u><u> </u><u>d</u><u>i</u><u>v</u><u>i</u><u>d</u><u>e</u><u>d</u><u> </u><u>b</u><u>y</u><u> </u><u>x</u><u>+</u><u>2</u>
Answer:
yes, yes, no
Step-by-step explanation:
1. L= i + 2j +k; P = -3i + j + k, line lies on one another at k
2. L =i + 2j + k and P = 6i -3j + k, the lines lie on one another at k
3. P = ai + bj and -2bi +2aj + (a+b) k