• ### Math Homework Help?

A solution is to be made that his 1 part of reagent for every 9 parts water. If a lab technician must make a total of 500 parts of this solution: a) How much reagent should be used? b) How much water should be used?
A solution is to be made that his 1 part of reagent for every 9 parts water. If a lab technician must make a total of 500 parts of this solution: a) How much reagent should be used? b) How much water should be used?
2 answers · Homework Help · 3 weeks ago
• ### The magnitude of the scalar projection of (1, m, 0) on (2, 2, 1) is 4. Determine the value of m.?

2 answers · Mathematics · 5 months ago
• ### Calculus Homework Help?

A tangent to the parabola, y = 3(x^2) -7x + 5 is perpendicular to x + 5y - 10 = 0. Determine the equation of the tangent.
A tangent to the parabola, y = 3(x^2) -7x + 5 is perpendicular to x + 5y - 10 = 0. Determine the equation of the tangent.
3 answers · Mathematics · 8 months ago
• ### Calculus Homework Help?

Determine the points on the graph of y = 3x/(x-4) where the slope of the tangent is - 12/25.
Determine the points on the graph of y = 3x/(x-4) where the slope of the tangent is - 12/25.
2 answers · Mathematics · 8 months ago
• ### Math Homework Help?

Solve the following equation, for 0 ≤ x ≤ 2 pi providing extract values or rounding to the nearest hundredth where exact value are not applicable. Equation: cos^2 x - sin^2 x = 2 - 5 cos x
Solve the following equation, for 0 ≤ x ≤ 2 pi providing extract values or rounding to the nearest hundredth where exact value are not applicable. Equation: cos^2 x - sin^2 x = 2 - 5 cos x
2 answers · Mathematics · 9 months ago
• ### Math Help (Its for my exam)?

1) If f(x)= mx^3 + gx^2 - x + 3 is divided by x + 1, the remainder is 3. If f(x) is divided by x + 2, the remainder is -7. What are the values m and g? 2) Factor fully using the factor theorem. Equation: 4x^4 - 19x^3 +16x^2 - 19x + 12 3) Solve this equation: y^6 - 64 =0 where x∈R and y∈R.
1) If f(x)= mx^3 + gx^2 - x + 3 is divided by x + 1, the remainder is 3. If f(x) is divided by x + 2, the remainder is -7. What are the values m and g? 2) Factor fully using the factor theorem. Equation: 4x^4 - 19x^3 +16x^2 - 19x + 12 3) Solve this equation: y^6 - 64 =0 where x∈R and y∈R.
2 answers · Mathematics · 9 months ago
• ### Chem Help?

How can the periodic table be used to help complete energy-level diagrams?
How can the periodic table be used to help complete energy-level diagrams?
1 answer · Chemistry · 9 months ago
• ### Math Homework Help?

Find the x intercept mathematically. (Round to 1 decimal place) y= (3^x=2) - 7
Find the x intercept mathematically. (Round to 1 decimal place) y= (3^x=2) - 7
3 answers · Mathematics · 9 months ago
• ### Math Help?

Background: The stellar magnitude scale compares the brightness of stars using the equation: m2 - m1 = log (b1/b2). m1 and m2 are the apparent magnitudes of the 2 stars being compared (how bright they appear in the sky). b1 and b2 are their brightness (how much light they actually they emit). This relationship does not factor in how far Earth the... show more
Background: The stellar magnitude scale compares the brightness of stars using the equation: m2 - m1 = log (b1/b2). m1 and m2 are the apparent magnitudes of the 2 stars being compared (how bright they appear in the sky). b1 and b2 are their brightness (how much light they actually they emit). This relationship does not factor in how far Earth the stars are. Questions: a) Sirius is the brightest-appearing star in our sky, with the apparent magnitude of - 1.5. How much brighter does Sirius appear than Betelgeuse, whose apparent magnitude is 0.12? b) The Sun appears about 1.3x10^10 times are brighter in our sky as does Sirius. What is the apparent magnitude of the Sun?
1 answer · Mathematics · 9 months ago
• ### Chem Help?

1) What does this equation: E=-2.178e-18(1/n^2)? 2) How does one find the number -2.178e-18? Explain (both equations)
1) What does this equation: E=-2.178e-18(1/n^2)? 2) How does one find the number -2.178e-18? Explain (both equations)
1 answer · Chemistry · 10 months ago
• ### How do you get -2.178e-18 in this formula; E=-2.178e-18(1/n^2)?

E=-2.178e-18(1/n^2)
E=-2.178e-18(1/n^2)
1 answer · Mathematics · 10 months ago
• ### Chem Help?

Calculate the frequency and wavelength of electromagnetic radiation emitted from a hydrogen atom if an electron moves from the third energy level to the first energy level.
Calculate the frequency and wavelength of electromagnetic radiation emitted from a hydrogen atom if an electron moves from the third energy level to the first energy level.
1 answer · Chemistry · 10 months ago
• ### Half Life Problems (thorium - 233)?

A 20 mg sample decays to 17 mg after 5 min. How long will it take to decay to 1 mg?
A 20 mg sample decays to 17 mg after 5 min. How long will it take to decay to 1 mg?
4 answers · Mathematics · 10 months ago
• ### Half Life Problems?

Determine the half-life of: 1) thorium - 233 A 20 mg sample decays to 17 mg after 5 min. 2) bismuth - 214 A 10 mg sample decays to 9 mg after 3 min.
Determine the half-life of: 1) thorium - 233 A 20 mg sample decays to 17 mg after 5 min. 2) bismuth - 214 A 10 mg sample decays to 9 mg after 3 min.
2 answers · Mathematics · 10 months ago

Solve this equation (logarithms) 5^x = 3 - 5^2x
Solve this equation (logarithms) 5^x = 3 - 5^2x
3 answers · Mathematics · 10 months ago
• ### Prove This?

Do questions: b, c, and e Show your work (all of it).
Do questions: b, c, and e Show your work (all of it).
1 answer · Mathematics · 10 months ago
• ### Prove This?

sin^4 x + 2 cos^2 x - cos^4 x =1
sin^4 x + 2 cos^2 x - cos^4 x =1
3 answers · Mathematics · 10 months ago

1 - (sin^2x tanx/(tanx+1)) - (cos^2x/(tanx+1)) = sinx cosx Show your work. Please don't skip any steps.
1 - (sin^2x tanx/(tanx+1)) - (cos^2x/(tanx+1)) = sinx cosx Show your work. Please don't skip any steps.
2 answers · Mathematics · 10 months ago