610 - 187 = 423
The answer should be 423. This is a subtraction problem right?
Step-by-step explanation:
10000-(10000n/20) = 10000 - (500n)
6500 = 10000 - 500n
3500 = 500n
n = 7
Answer:
We reject H₀ , we have enough evidence, women today are taller than in 1990
Step-by-step explanation:
The problem is one tail test. We assume height of women follows normal distribution with σ = 0,5 in.
Then null hypothesis : H₀ ⇒ μ₀ = 63.7
Alternative hipothesis: Hₐ ⇒ μ > 63.7
Significance level 0,05 ⇒ z(c) = 1.645
Statistic z :
z (c) = ( μ - μ₀ ) / (0,5/√45) ⇒ z(c) = (63.9 - 63.7 ) / (0,5 / √45)
z(c) =( 0,2* √45 ) / 0,5
z(c) = 2,68
Evaluation : z(s) > z(c) 2.68 > 1.645
z(c) is in the rejection area we reject H₀
Answer:
x⁴ + 3x³ + 4x² + 12x = 0
<=> x³(x + 3) + 4x(x + 3) = 0
<=> (x³ + 4x)(x + 3) = 0
<=> x(x² + 4)(x + 3) = 0
Point c would be Positive 0.75 because it’s the opposite of -0.5 because they are the same distance from b