Ask question

Ask question

All categories

3 years ago

11

A manatee surfaced for air 6 times in 240 seconds. How many seconds went by before the manatee surfaced the fourth time if it he

ld its breath for the same rate?

1 answer:

Norma-Jean [14]3 years ago

3 0

I think it is 160 seconds

You might be interested in

H(x)=(x^2)+1 and K(x)=-(x^2)+4. If K(H)=0, what are the roots/solutions?

zubka84 [21]

$H(x)=(x^2)+1\ \ \ \ and\ \ \ \ K(x)=-(x^2)+4. \\\\K(H)=-(H^2)+4=-(x^2+1)^2+4=4-(x^2+1)^2=\\\\.\ \ \ =2^2-(x^2+1)^2=(2-x^2-1)(2+x^2+1)=(1-x^2)(3+x^2)=\\\\.\ \ \ =(1-x)(1+x)(x^2-3\cdot i^2)=(1-x)(1+x)(x- \sqrt{3} \cdot i)(x+ \sqrt{3} \cdot i)\\\\ K(H)=0\ \ \ \ \Leftrightarrow\ \ \ (1-x)(1+x)(x- \sqrt{3} \cdot i)(x+ \sqrt{3} \cdot i)=0\\\\x=1\ \ \ \ or\ \ \ \ x=-1\ \ \ \ or\ \ \ \ x=\sqrt{3} \cdot i\ \ \ \ or\ \ \ \ x=-\sqrt{3} \cdot i\\\\Ans.\ e.$

4 0

3 years ago

Which of the following points lie in the solution set to the following system of inequalities? y > −3x + 3 y > x + 2

OverLord2011 [107]

Answer:

y> -3x

3

y > x +2

5 0

3 years ago

128 is 74% of what number

GarryVolchara [31]

Percent means parts out of 100
74%=74/100=0.74

'of' means multiply

so
128 is 74% of what means
128=0.74 times what
divide both sides by 0.74
172.97297297297297297297297297297=what
the number is about 173

5 0

2 years ago

Find f(-5) if f(x) = Ix+1I

gulaghasi [49]

Answer:

x = 4

Step-by-step explanation:

f(x) = I x+1 I

when x = -5

f(-5) = I (-5) +1 I

= I -5+1 I

= |-4|

= 4

3 0

3 years ago

Read 2 more answers

In ABC, m∠A=10 and m∠B=145. Select the triangles that are similar to ABC.

Tanya [424]

Answer:

A

Step-by-step explanation:

A triangle has 180 degrees.

So, 10 + 145 + x = 180

x = 25

This means that the angles in the triangle are:

10, 145, and 25

Using this information, only A has the same values so it is the answer

3 0

3 years ago