# Saif

Popular questions and responses by Saif
1. ## trigonometry

From the top of a fire tower, a forest ranger sees his partner on the ground at an angle of depression of 40º. If the tower is 45 feet in height, how far is the partner from the base of the tower, to the nearest tenth of a foot? (Detailed explanation

2. ## PHY

. Four identical metal spheres have charges of qA = –8.0 µC, qB =–2.0 µC, qC = +5.0µ C, and qD = +12.0µ C. (a) Two of the spheres are brought together so they touch, and then they are separated. Which spheres are they, if the final charge on each

3. ## Physics

Which of the following statements about Ohm’s Law is true? A. Keeping the same voltage and decreasing resistance decreases the current. B. To increase the current, decrease the resistance. C. Ohm’s law relates power, current and resistance. D.

4. ## math

Three girls shared a cake .A gets 3/8 of the cake , B gets 1/4 of the remainder . How much does C get ?

5. ## science

if a mass of 2.4 g of magnesium is burnt in air, 4.0g of magnesium oxide is formed. 1- what kind of reaction is this ? explain your answer b- what was the mass of oxygen that reacted with the magnesium? explain you answer

6. ## calculus

A satellite is free falling from a distance (d) of the surface of the moon with radius (R), with zero initial velocity. At what rate does the area of the portion of the moon visible to the satellite decrease at a time (t) after the free fall starts? When

7. ## physics

maximum and minimum magnitude of resultant of two vectors r 17 and 7 respectively what is the magnitude of resultant vector when both r perpendicular to each other??

8. ## Math

Suppose an equation that describes the path of a diver when diving off a platform is d = -5t^2 + 10t + 20. Where d is the distance above the water in (feet) and t is the time from the beginning of the dive(seconds). After how many seconds is the diver 25

9. ## Statistics

Suppose that 20% of the students in a college are smokers. A sample of 10 students is randomly selected from this college. What is the probability that at least 3 students in this sample are smokers?

10. ## Great Cities Past and Present

Answer the following questions in a few sentences. Shanghai Questions 1. How did Shanghai merge East and West in the era of colonialism? Who do you think benefited most from the city as it existed at that time? 2. How was Shanghai transformed in the

11. ## Physics

The output voltage and current of a transformer are determined by the A. number of turns in the primary and secondary coils. B. ferromagnetic material of the rings connecting the coils. C. strength of the DC current in the primary coil. D. direction of the

12. ## Physics

Water is falling on turbine at a rate of 6000 kg/min the height of fall is 100 m what is the power given to turbine?

13. ## math

Myrza has three children a.If his oldest child is a girl, what is the probability that all the children are girls ? b.Given at least one of them is a boy, what is the probability of all of them are boys ?

14. ## calculus

the lemniscate revolves about a tangent at the pole find sufaces of the solid generated?

15. ## Engineering Mechanics

A force of 100 N is acting at a point Resolve this force along 300 and 400

16. ## math

k + 9 greater than 12

1. ## Great Cities Past and Present

i need answers to the following question

posted on March 3, 2018
2. ## Math

a. 2*4*3=24 b. 2*4*3*3*4=288

posted on October 28, 2016
3. ## calculus

Steve-that is all the given info Damon- no. thanks Eryk i will try it it is an application of derivative

posted on December 4, 2015
4. ## Chemistry

Well the answer is definitely correct because that is the one selected on the answer sheet. I don't know why though.

posted on May 28, 2013
5. ## math

49

posted on March 28, 2013