# Nolan

Most popular questions and responses by Nolan
1. ## Math 7 A

Walter had 2/4 yard of string he used 1/2 of the string for a school project. How many yards of string did he use for his project?

2. ## Math

How do we know the ith of an invertible matrix B is orthogonal to the jth column of B^-1 , if i is not equal/unequal to j?

Which two orbitals overlap to form the sigma bond between C and H in C2HF?

4. ## Physics

A 50-kg ice skater moves around a bend at 8 m/s. The radius of the bend is 8 m. Centripetal force is provided by friction between the blade of the skates and the ice. What is the amount of centripetal force?

5. ## physics

A 50-kg penguin stands on ice. A helium balloon is attached to the penguin by means of a harness and pulls upward with a force of 90 N. What is the normal force of the ice on the penguin?

6. ## calculus

2. A spin balancer rotates the wheel of the car at 480 revolutions per min. if the diameter of the wheel is 26 in what road speed is being tested in the miles per hour? Round to the nearest tenth

7. ## geometry

The sides of a quadrilateral are 3, 4, 5, and 6. Find the length of the shortest side of a similar quadrilateral whose area is 9 times as great.

8. ## calculus

3. Your neighbor puts tiger on his flat roof shed. You and another neighbor argue over the ht of the tiger. At a distance of 80 ft from the shed your angle of elevation from the ground level to the top of the shed is 5.74 degree. The angle of elevation to

9. ## PHYSICS

79X190 find (a) the net electrical charge of the nucleus, (b) the number of neutrons, (c) the number of nucleons, (d) the approximate radius of the nucleus, and (e) the nuclear density. I have already determined B and C. I only need to know the equations

10. ## physics

In the ballroom of a historic palace near Paris, a chandelier hangs from the ceiling by a cable. The mass of the chandelier is 390 kg. Find the tension in the cable.

11. ## physics

A 32.0-kg penguin on frictionless ice holds onto the end of a horizontal spring with spring constant 250 N/m and oscillates back and forth. What is its period of oscillation?

12. ## physics

A physics professor lifts her 9.0-kg briefcase at constant speed with an upward force. Find the magnitude of her force.

13. ## Math

In a class of thirty students, 1 person comes to school with the flu. On the third day, 5 students have the flu. Write an equation expressing the problem

14. ## calculus

1. A hill with a 35 degree grade (incline with horizontal) is cut down for a roadbed to a 10 degree grade. If the distance from the base to the top of the original hill is 800 ft., How many vertical ft will be removed from the hill rounded to the nearest

15. ## physics

A 10-kg duffle bag is undergoing a vertical acceleration of 0.050 m/s2 (positive for up, negative for down), while its owner is holding it with an upward force. What is the magnitude of this force?

16. ## science

What is matter in which every particle is identical?

17. ## Geometry

IS Evrey rectangle a square or is evrey rhombus a paralleogram. I forgot these things need help!

18. ## College Algebra

Which of the following is equivalent to (2x-3)^2=25 ? A) 2x - 3 = 5 B) 2x - 3 = -5 C) 2x - 3 = 5 and 2x - 3 = -5

19. ## physics

A physics professor lifts her 9.0-kg briefcase at constant speed with an upward force. Find the magnitude of her force.

20. ## science

What holds atoms together in a molecule?

21. ## calculus

4. You are at Lowes and a man is leaning against three sections of fencing that are 6,7 and 12 ft long. A Lowe’s person tells him to discard the 12 ft section and buy a 10ft section. She informs the customer that this would save money and would fence a

22. ## math

how do you make 9=6 (using roman numerals ) be equal on both sides

23. ## physics

A physics professor lifts her 9.0-kg briefcase at constant speed with an upward force. Find the magnitude of her force.

24. ## PHYSICS

a swimmer develops an average of 200 watts in a distance of 100m in 80 seconds. what is the force resistance in the water?

25. ## science

what is the increase in volume as temperature increases?

26. ## Math

What is the simplified sum when you evaluate 10/15 + 1/4

27. ## Math - fractions

Name 4 fractions between 1/2 and 5/7

1. ## math

I think it is 3w

posted on December 2, 2019
2. ## math

The formula is wrong. It should be term(n) = ( n^3 + 23(n) - 8 ) / 2

posted on January 19, 2019
3. ## Science

posted on December 10, 2018
4. ## Math

4.228

posted on December 3, 2017
5. ## Chemistry

For n=5 l=2 we get 5d, which has 5 orbitals and added s and p (1 and 3) we get 9.

posted on November 4, 2017
6. ## Math 7 A

Thank you Ms. Sue

posted on November 4, 2017
7. ## Science

THANK YOUU

posted on October 21, 2017
8. ## AP CHEM FULL ?

could you please explain how you know that compound E is NH3 and compound A is nitric acid

posted on February 25, 2015
9. ## physics

Actually I didn't know that formula haha. Thanks!

posted on February 25, 2011
10. ## algebra

x^2-18x+___=( )^2

posted on May 23, 2010

I don't agree Anonymous. To solve 2nd degrees equations (aka find the roots of a trinomial function), you have first to put it to this form : ax² + bx + c = 0 (where a, b and c are reals) Then you have to calculate its discriminant (its delta) : Δ = b²

posted on April 27, 2010

Simple equation : X = -sqrt(2)/sec(1/4) = -sqrt(2)*cos(1/4) It's not a round value.

posted on April 27, 2010
13. ## 12th grade agebra 2

For the first one : You put X = x² Then you have (variable change) : X² - 6X + 8 = 0 And you use common tools to solve that (use delta). You find X = 2 or X = 4. You have x² = X, so x = sqrt(X) or x = -sqrt(X). Here, the solutions are sqrt(2), -sqrt(2),

posted on April 27, 2010

Id say... b

posted on April 27, 2010