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Tasya [4]
3 years ago
13

Mr Lim read 3 books in 2 hours. He took the same amount of time to read the first two books. He took 15 minutes longer to read t

he third book than the first. How many minutes did he take to read the third book?
Mathematics
1 answer:
Naya [18.7K]3 years ago
5 0
He took 75 minutes to read the third book.
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a cone and a sphere have the same volume. the height of the cone is 96 units. what would be the values for the radius of the con
jolli1 [7]

The volume V_c of a cone  with base radius r_c and height h_c is

V_c = \dfrac{1}{3}\pi r_c^2 h_c

Similarly, the volume V_s of a sphere with radius r_s is

V_s = \dfrac{4}{3}\pi r_s^3

We know that V_c=V_s and that h_c=96

So, we can set up the following equation:

\dfrac{96}{3}\pi r_c^2=\dfrac{4}{3}\pi r_s^3

We can simplify the common denominator 3, and pi appearing on both sides:

96r_c^2=4r_s^3

We can divide both sides by 4:

24r_c^2=r_s^3

Without further information, this is all we can say: the cubed radius of the sphere is the same as 24 times the squared radius of the cone.

3 0
3 years ago
Explain how comparing 645 and 738 is different
DerKrebs [107]
Well both the hundred places are different so u would know that comparing it would be that the 738 is bigger than 645
4 0
3 years ago
Evaluate tan(sin^-1(-4/5)). Enter your answer as a fraction using the slash bar (/).
Anvisha [2.4K]

Answer:

-1333/1000

Step-by-step explanation:

Evaluate tan(sin^-1(-4/5)).

First we need to evaluate the expression in parenthesis

sin^-1(-4/5)

= sin^-1(-0.8)

= -53.13

SUbstitute the given value into the original expression as shown;

tan(sin^-1(-4/5))

=  tan(-53.13)

= -1.333

= -1333/1000

Hence the required answer is  -1333/1000

8 0
2 years ago
Read 2 more answers
solve. 1/3/4+ 7/8 A. 2/1/4 B. 2/5/8 C. 2/3/8 D. 3/1/2
sleet_krkn [62]

Answer:

god is the answer to everything

Step-by-step explanation:

god

5 0
2 years ago
What is the product?
Kazeer [188]

Answer:

2) -81t² +16

Step-by-step explanation:

(9t -4)(-9t -4) = (9t x -9t) + (9t x -4) + (-4 x -9t) + (-4 x -4)

                     = -81t² - 36t + 36t + 16

                     = -81t² + 16

4 0
2 years ago
Read 2 more answers
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