physics
he travels 120m up the slope That means he travels 120 cos15° horizontally
Math- Precalculus
recall the tangent addition/subtraction formulas. You have tan(pi/5 - pi/3) = tan(-2pi/15) = -tan(2pi/15)
calculus
what's the problem? Set p=1000 and solve for x: 1000 = 10,000(1 − (5/5 + e^−0.001x)) 0.1 = 1 − (5/5 + e^−0.001x) 0.9 = 5/5 + e^−0.001x I suspect a typo,for 5/5 makes little sense. However, moving right along, -0.1 = e^-.001x Now we know there&...
calculus
The demand function for a product is given by p = 10,000(1 − (5/5 + e^−0.001x)) where p is the price per unit (in dollars) and x is the number of units sold. Find the numbers of units sold for prices of p = $1000 and p = $1500.(Round your answers to the nearest int...
Periodic Function (Trigonometric Fuctions)
If the distance is r, then r/30 = cos 30°
math
a = 644(5x) + 644(8y) = 644(5x+8y)
Maths
what's the problem? Just list them: 1/2 1/3 2/3 1/4 2/4 3/4 ... 1/10 2/10 ... 9/10 remove the duplicates and count them.
Math
.30*679.95 = 203.99
Calculus
you don't want the minima and maxima of (x^2-4)/(1+cos(x)^2) That is not f(x). It is f'(x). So, the minima and maxima of f(x) occur when (x^2-4)/(1+cos(x)^2) = 0.
Chemistry
convert 600mg to moles. 2HCl + Mg(OH)2 = MgCl2 + 2H2O so, each mole of Mg(OH)2 needs 2 moles of HCl. So, now you know how many moles of HCl you need. For .5M HCl solution, you will need 2L (2000ml) of acid for each mole.
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