# Posts by Brock

Total # Posts: 58

**Pre Cal**

The intensity of light decreases by 4% for each meter that it descends below the surface of the water. At what depth is the intensity of light only 20% of that at the surface?

*February 3, 2017*

**Algebra**

Which are the order pair for 3x+y>6

*November 2, 2016*

**Physics**

A 5 kg ball is moving 4m/s to the right when it collided least ally with a 2 kg ball moving at 6 m/s to the left. After the collision, the 5 kg ball is moving .8 m/s to the right. What is the velocity of the 2 kg ball?

*January 21, 2016*

**Science**

200n,

*June 1, 2015*

**physics**

Two artifacts in a museum display are hung from vertical walls by very light wires. Wire T1 is horizontal from the left wall and goes to a center weight of 177N and wire T2 is at a 53 degree angle with the right wall heading from right to left downwards towards the center ...

*December 7, 2014*

**physics**

Two artifacts in a museum display are hung from vertical walls by very light wires. Wire T1 is horizontal from the left wall and goes to a center weight of 177N and wire T2 is at a 53 degree angle with the right wall heading from right to left downwards towards the center ...

*December 7, 2014*

**Physics**

Two artifacts in a museum display are hung from vertical walls by very light wires. Wire T1 is horizontal from the left wall and goes to a center weight of 177N and wire T2 is at a 53 degree angle with the right wall heading from right to left downwards towards the center ...

*December 6, 2014*

**Physics**

Two 34 −ìC charges are attached to the opposite ends of a spring of spring constant 150 N/m and equilibrium length 50 cm. that is the question I should probably know this but my brain is fried so far all I have is Original length = 50 cm = 0.5 m Let the spring ...

*September 7, 2014*

**Government**

What is the procedure of voter identification intended to help prevent fraudulent voting and keep the process organized? A. Registration B. Precinct Divisions C. Political Socialization D. Franchising E. Gerrymandering

*July 7, 2013*

**algebra**

1/2-3m/4 +7=4m- 9- m/28

*March 12, 2013*

**pre-calcus**

In the following function determine the domain, range, and asymptotes. f(x)= 5*(1/3)^x

*January 3, 2013*

**calculus**

solve the exponential equation. Express the solution in terms of natural logarithms. e^x=9.2 a. whats the solution in terms of natural logarithms? **is the answer e^9.2 or just e^9 b. type a decimal rounded to 3 decimal places.

*January 1, 2013*

**calculus**

solve the logarithmic equation. be sure to reject any value of x that is not in the domain of the orginal logarithmic expression. In square root x+7=2 what is the exact solution? a.)the solution set is ? b.)there are infinitely many solutions c.)there is no solution

*January 1, 2013*

**calculususe the rational zeros theorem to list the**

use the rational zeros theorem to list the potential rational zeros of the potential function. Do not attempt to find the zeros. f(x)=2x^5-x^3+8x^2+52

*December 27, 2012*

**calculus**

Use the intermediate value theorm to show that the polynomial function has a zero in the given interval f(x)=x^5-x^4+8x^3-5x^2-14x5;[1.4;1.5] find the value of f(1.4) f(1.4)= find the value of f(1.5) f(1.5)=

*December 27, 2012*

**biology**

waz up

*December 1, 2012*

**Calculus**

Write the statements for the basis, the induction hypothesis, and the induction step for the questions below. 1. 1 + 2 +…+n = n(n+1)/2 2. 1/1*2 + 1/2*3+…+1/n*(n+1) = n/n+1

*August 8, 2012*

**AP Calc**

Use mathematical induction to prove that the statement holds for all positive integers. Also, can you label the basis, hypothesis, and induction step in each problem. Thanks 1. 2+4+6+...+2n=n^2+n 2. 8+10+12+...+(2n+6)=n^2+7n

*August 5, 2012*

**AP Calculus**

* The sequence is geometric and the r=-11. Thank you for any help!

*July 10, 2012*

**AP Calculus**

Find the sum of the first n terms of the sequence. The sequences are either arithmetic or geometric. 13. -1, 11, -121, ...; n = 9 A. 235,794,769 B. 429,981,696 C. -429,981,696 D. 196,495,641 E. -196,495,641 F. -235,794,769 I know that n = # of terms (9) d = -11 a = -1 formula...

*July 10, 2012*

**Calculus**

Write the sum using summation notation. 2 + 5 + 8 + 11 + ... + 29 Also, I know that it is going up by 3 units. But I am not sure how to get it into the form below: example: 15 ‡” k +3 k-1

*July 10, 2012*

**Calculus**

Thanks Steve!

*July 10, 2012*

**Calculus**

Find the first 4 terms and the 8th term of the recursively-defined sequence. 4. v1 = 0.75 and vn = (-2)vk-1 for n>1 A. 0.75, 1.5, -3, 6; -192 B. -1.5, -3, -6, -12; 192 C. -1.5, -3, -6, -12; -192 D. 0.75, 1.5, 3, 6; -192 E. 1.5, 3, 6, 12; 192 F 0.75, -1.5, 3, -6; 192 Can ...

*July 10, 2012*

**AP Calculus**

Find the first 4 terms and the 8th term of the recursively-defined sequence. b1 = 2 and bk+1 = 3bk, for k>0 A. 6, 18, 54, 162; 13,122 B. 3, 6, 9, 12; 24 C. 5, 8, 11, 14; 26 D. 6, 12, 24, 48; 768 E. 2, 6, 18, 54; 4374 F. 2, 4, 8, 16; 256 Thanks!

*July 10, 2012*

**Calculus**

Write the equation of an ellipse with the foci (17, 0) and (-17, 0) and co-verticies (0, 15) and (0, -15).

*July 5, 2012*

**Calculus**

Complete the square to write the equation x^2 + y^2 - 6x - 2y + 4 = 0 in standard form. Use the standard form of the equation to identify the center and the radius of the circle.

*July 5, 2012*

**Calculus**

Let u = (-2,3) and v = (5,-6). Find the sum and the dot product of these two vectors.

*July 5, 2012*

**Calculus**

Find a unit vector in the direction of v = (1,-1). Write your answer as a linear combination of the standard unit vectors i and j. Round each component to the nearest hundredth, if necessary. A 0.71i - 0.71j B 0i - 0j C 1.41i - 1.41j D 1i - 1j E 2.83i - 3.83j F -1i - 1j

*July 3, 2012*

**Calculus**

Thanks dude! That was a tough question.

*July 3, 2012*

**Calculus**

Find the dot product of (u+v)*w u=-1,3 v=2,4 w=2,-5 Answer choices: A:37 B:-37 C:-29 D:-33 E:29 F:9

*July 3, 2012*

**Calculus**

u=-1,3 and w= 2,-5. Find the component form of the vector. 3. 2u + 3w A 0,1 B 5,-12 C 2,3 D 1,-2 E -3,8 F 4,-9

*July 1, 2012*

**Math**

811,450

*July 1, 2012*

**Calculus**

Yes

*May 8, 2012*

**Calculus**

Find the foci of the equation 25^2 + x^2 = 600 Thank you!

*May 8, 2012*

**Chemistry**

thank you.

*March 24, 2012*

**Chemistry**

Lewis Structure of Freon (CCI2F2)? And what is shape?

*March 24, 2012*

**zoology**

what is diastema

*October 21, 2011*

**zoology**

define stroke volume.

*October 20, 2011*

**zoology**

what is diastema?

*October 20, 2011*

**zoology**

what is the dental formula of rabbit?

*October 20, 2011*

**physics numerical**

a parallel combination of two resistors of 2ohm each has third resistor of 4ohm in series with the combination.if a battery of 10V with negligible internal resistance be applies across them,find the p.d. across the resistor.

*October 20, 2011*

**physics numerical**

an electron moving with the speed of 1067 m/s is passed into a magnetic field of intensity 0.1T normally.what is the radius of the path of the electron inside the field? if the strength of the magnetic field is doubled, what is the new radius of the path? (e/m=108*10611 C/kg)

*October 20, 2011*

**physics numerical**

a satellite orbitting the earth at the equator at a na ltitude of 400 km, has an antenna that can be modelled as a 2.0m long rod. the antenna is oriented perpndicular to the earth's surface. at the equator, the earth's magnetic field is essentially horizontal and has a...

*October 20, 2011*

**physics numerical**

a long horizontal wire is rigidly placed, carrying a current of 50a. another parallel long wire carrying a current of 40a is just supported above it.determine the distance between them at which the upper wire can be just supported by magnetic repulsion itself.(weight of upper ...

*October 20, 2011*

**physical chemistry**

if 10 litres of a solution of na2co3 contains 21.2g of na2co3, what is its strength?

*October 20, 2011*

**organic chemistry**

how could you obtain benzaldehyde from toluene?

*October 20, 2011*

**math**

what is 8/360

*May 15, 2011*

**SCIENCE/BIOLOGY**

How does alanine differ from glycine

*January 25, 2011*

**physics**

HAHA!

*December 14, 2010*

**math**

what is 1/4(5y-3)+1/16(12y+17)?

*September 23, 2010*

**Physics**

R=8.314 you also must convert 40cm^3 to m^3 1m^3= 10^6 cm^3

*December 10, 2009*

**Physics**

If a 2 m tall man is looking at a plane mirror from an eye which is 20 cm from the top of his head, what is the minimum length that the mirror must be so that he can just barely see his whole body in the mirror? How far up from the ground must the mirror be placed? I'm ...

*February 24, 2009*

**Physics**

(I'm not sure about the negative sign)

*February 24, 2009*

**Physics**

I got: Ho=100 cm Di=-24 cm Do=120 cm I rearranged -Di/Do=1/5 to get -5Di=Do. Then I substituted -5Di in for Do in 1/Do + 1/Di = 1/30 to solve for Di. Is that right?

*February 24, 2009*

**Physics**

KNOWNS: Diverging (convex) mirror Radius of curvature = 60 cm (f = 30 cm) M = 1/5 Hi = 20 cm UNKNOWNS: Ho? Di? Do? EQUATIONS: 1/Do + 1/Di = 1/f M = Hi/Ho = -Di/Do

*February 24, 2009*

**Physics**

Can mirrors create virtual inverted images?

*February 24, 2009*

**geometry**

how do you find the area of a parallelogram?

*March 27, 2008*

**science-plz help this is so urgent!**

Mamuairi Monument, this contains fresh water it tells you all the answers.

*June 7, 2007*

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