Answer:
125km
Step-by-step explanation:
<em>50km</em><em> </em><em>÷</em><em> </em><em>2in</em><em> </em><em>=</em><em> </em><em>25km</em><em> </em><em>per</em><em> </em><em>1</em><em> </em><em>in</em><em>.</em>
<em>5</em><em> </em><em>in</em><em>.</em><em> </em><em>×</em><em> </em><em>2</em><em>5</em><em> </em><em>km</em><em> </em><em>=</em><em> </em><em>125km</em>
5.29150262213 is the square root of 28. Therefore, it is between the numbers 5 and 6. Another way to think of this is that √28 is directly between √25 (which 5 is the answer to) and √36 (which 6 is the answer to).
Answer:
175 (b)
Step-by-step explanation:
25*14=350
350/2=175
Answer: a = 8
Step-by-step explanation:
Volume of a square based pyramid is given as
.
where a is the length of the side and h is the height.
Substituting into the formula , we have
V =
128 = 
/3
384= 
X 6
Divide through by 6
384/6 =
64 =
Therefore :
a = 
a = 8
Answer:
0.0549
0.7617
0.2383
Step-by-step explanation:
Given that:
Probability that incoming email is spam ;
P(spam) = 0.38
If three emails are in my inbox, what is the probability that:
A. All three messages are spam.
P(1st message being spam) * p(second message being spam) * p(3rd message being spam)
= (0.38) * (0.38) * (0.38)
= 0.054872
= 0.0549
B. At least one of the three messages are spam.
1 - p(none of the 3 messages are spam)
P(none of the 3 messages are spam)
P(not spam) = 1 - p(spam) = 1 - 0.38 = 0.62
1 - [P(not spam) * p(not spam) * p(not spam)]
1 - (0.62 * 0.62 * 0.62)
= 1 - 0.238328
= 0.761672
= 0.7617
C. None of the three messages are spam.
P(not spam) = 1 - p(spam) = 1 - 0.38 = 0.62
P(not spam) * p(not spam) * p(not spam)
(0.62 * 0.62 * 0.62)
= 0.238328
= 0.2383
