All categories

4 years ago

Is 121 a prime or composite number

Mathematics

1 answer:

Whitepunk [10]4 years ago

3 0

121 is a composite number because 121 = 11 x 11

11 is a prime number, but 121 is a composite number.

You might be interested in

Determine the intercepts of the line. 7x-5=4y-6/7x−5=4y−6

DIA [1.3K]

I hope this helps. i didnt get what / meant... did you mean divide?

5 0

4 years ago

Read 2 more answers

An astronaut on the moon throws a baseball upward. The astronaut is 6 ft 6 in tall, and the initial velocity of the ball is 40 f

weqwewe [10]

Answer:

t = 0.293 s and 14.52 s

Step-by-step explanation:

The heights of the ball in feet is given by the equation as follows :

$S = -2.7t^2+40t+6.5$

Where t is the number of seconds after the ball was thrown.

We need to find is the ball 18 ft above the moon's surface.

Put S = 18 ft

$-2.7t^2+40t+6.5=18\\\\-2.7t^2+40t=18-6.5\\\\-2.7t^2+40t-11.5=0$

It is a quadratic equation. Its solution is given by :

$t=\dfrac{-40+\sqrt{40^{2\ }-4\left(-2.7\right)\left(-11.5\right)}}{2\left(-2.7\right)},\dfrac{-40-\sqrt{40^{2\ }-4\left(-2.7\right)\left(-11.5\right)}}{2\left(-2.7\right)}\\\\t=0.293\ s,14.52\ s$

So, the ball is at first 0.293 s and then 14.52 s above the Moon's surface.

8 0

3 years ago

£48 in the ratio of 3:1

pentagon [3]

If you mean out of £48,

answer: £36:£12

5 0

3 years ago

I need help please (geometry)

Galina-37 [17]

Answer:

Step-by-step explanation:

It is easy just: step 1: connect all dots then add your numbers up

4 0

3 years ago

I’m giving 30 points

Over [174]

Answer:

#3: 81

Step-by-step explanation:

I haven't done this type of math in a while so I'm unsure about #1 and #2, but #3 is 81.

3^4 = 3 × 3 × 3 × 3

3^4 = 9 × 3 × 3

3^4 = 27 × 3

3^4 = 81

8 0

4 years ago