03/30/17
The Inverse Square Law
Hi, I have a hard time understanding the concept of the Inverse Square Law, and hence, answering this question. Please help!
The inverse square law for the intensity of light explains why we...
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03/29/17
A locomotive is 58 foot long and 11 foot wide . a special effects designer makes a model that is 20 inches long . how wide should it be?
A locomotive is 58 foot long and 11 foot wide. A special effects designer makes a model that is 20 inches long . How wide should it be?
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03/29/17
Need variable, inequality and solution
How do you use inequalities to solve problems? I was absent and this is make up work and I'm lost...
Marcus needs to bike at least 80 miles this week for his training. If he has already biked...
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03/29/17
You need 300 ml of a 60% alcohol solution. Onhand you have 50% alcohol mixture and a 75% alcohol mixture. How many of each mixture will you need to obtain the
Need answer
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03/29/17
a pork roast was taken out... newtons law of cooling (warming))
A pork roast was taken out of a hardwood smoker when its internal temperature had reached 185°F and it was allowed to rest in a 65°F house for 15 minutes after which its internal temperature had...
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03/29/17
55 is 40% of what number?
I need help in pre-algebra math and I'm in a time crunch.
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03/29/17
y=1/2sin x. find the domain,range,amplitude, and period
y=1/2sin x
domain=?
range=?
amplitude=?
period=?
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03/29/17
Use properties of logarithm and exponential to solve the following equations:
a) 2+3x−1 =18
b) ln(x2 −4)=8
c) log3(x−2)+log3(x+1)=6
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03/29/17
Evaluate the function - where did I go wrong?
Evaluate the function:f(x) = x^2 + 5x + 8at the given values of the independent variable and simplify.f(x+5) =My work is as follows:Fill in the original statement with the given variable:f(x+5) =...
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03/29/17
2x^2 +4x+1=0
find the discriminant for the equation . then determine the nature of solutions for the equation.
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03/29/17
Physics Help. You hang a 5kg mass from the end of a rod that is 1.7 m by 2 mm by 2 mm. you observe that the rod's length increases to 1.74 m.
What is the stress? What is the strain? What is Young's modulus for this material?
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03/29/17
exponential equation
rewrite as an exponential equation: ln30=3.4012
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03/29/17
inverse composition
show that f(x)=x+5/4 and g(x)=4x-5 are inverses using composition.
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03/29/17
approximate logarithm
approximate logb 15b given that logb3≈2 and logb5≈5
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03/28/17
With the sun directly overhead, an airplane takes off at a speed S of 221mph at an angle thetaθ of 19° above the horizontal.
How fast is the airplane's shadow moving along the runway
?
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03/28/17
The sum of two numbers is 126. The difference of the same two numbers is 52. What is the higher of the two numbers?
write and solve a system of linear equations that represent the scenario.
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03/28/17
Prove that these are identities
2cosx - secx = cosx - tanx/cscx
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03/28/17
After knee surgery John walks 1/4 mile in each 1/6 hour, find the rates using a model.
It needes to be answered in a model
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03/28/17
Is this equation solvable?
I'm a business owner trying to back into a variable in a budget. Is it possible to solve for x without resorting to plugging in numbers till one works?
y+(y*0.1)=$7,977
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03/28/17
Evaluate the expression: v ⋅ w
Given the vectors: r = <8, 1, -6>; v = <6, 7, -3>; w = <-7, 5, 2>
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03/28/17
Suppose A and B are 4x4 matrices such that detA=-2 and detB=3 , find det [ A^3*(detB^-1)]
Suppose A and B are 4x4 matrices such that detA=-2 and detB=3 , find det [ (A3)det(B-1 ) ]
I dont understand how to find det(detB-1) . What is the property for this?
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03/27/17
object distance question.. please help :)
A converging lens with f=29.8 cm yields an image with magnification M=−2.5. Find the object distance. in terms of centimeters. They will be assumed to be cm.to a precision of tenths of a...
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