Answer:
yes
Step-by-step explanation:
So basically we have to solve 100 = -x² + 10x + 300 for x.
x² - 10x - 200 = 0
(x - 20)(x + 10) = 0
x = 20, -10
<span>Assuming lux (I) is I(d)=10/d^2, d>0, then the the photographer should calculate approximate instantaneous rate of change of a light at exactly 3m from a flash bulb to be ((I(3.1)-I(2.9))/(3.1-2.9), using an interval of d between 2.9 and 3.1.</span>
Hello !
Answer:
Step-by-step explanation:
Pythagorean Theorem : a² + b² = c² ⇔ b² = c² - a²
Here, we have a = 4 and c = 6 so :
b² = 6² - 4²
⇔ b² = 36 - 16
⇔b² = 20
⇔ b = √20 (and not b= -√20 because b ≥ 0)