The answer to number one is b
Answer:
Below.
Step-by-step explanation:
( 1 + sin a) / (1 + csc a)
= (1 + sin a ) /( 1 + 1/ sin a)
= ( 1 + sin a) / (sin a + 1)/ (sin a)
= (sin a(1 + sin a)) / (1 + sin a)
= sin a.
tan a / sec a
= (sin a / cos a) / (1 /cos a)
= (sin a cos a) / cos a
= sin a
The two expressions are both equal to sin a:
Therefore
(1 + sin a) /( 1 + csc a) = tan a / sec a.
Answer:
A
Step-by-step explanation:
the given equation can be simplified to 12m+17
so if we simply the other options we see that A = 13m+17
Answer:
a) How many African-Americans would you expect to get promotions?
Since we have been asked to follow the binomial distribution, (B (40,0.2)
To calculate the mean of the BPD = n*p
where n is the number of promotions and p = probability
= 40 x 0.2 = 8
You expect 8 promotions.
b)
The probability that 5 African-Americans = P (X = 5)
P( X = 5 ) = 40 sqr root ( 5 * 0.2^5 * 0.8^35 ) = 0.0854
c) What is the probability that five or fewer African-Americans receive promotions?
P( X <= 5) = P(X=5) + P(X=4) + ... + P(X=1) + P(X=0)
faster way is calculator
binomcdf(40, .2, 5) = 0.1613
Step-by-step explanation:
