All categories

3 years ago

Jackson started writing a story at 8:30 AM He stopped writing at 1:15 P.M. How long did he write?

Mathematics

1 answer:

Scilla [17]3 years ago

7 0

Answer: he wrote for an five hours and forty-five minutes

Step-by-step explanation:

You might be interested in

Please help me with this question!!

quester [9]

Answer:

Step-by-step explanation:

a1 = 6

a2 = 10

a3 = 14

The next member of the sequence is 4 more than the current sequence. Therefore d = 4

a1 = 6

d = 4

n = 13

an = a1 + (n - 1)*d

an = 6 + (n - 1)*4

a_13 = 6 + 12*4

a_13 = 6 + 48

a_13 = 54

8 0

2 years ago

Someone please help me!! I'll give brainliest

MariettaO [177]

Answer:

sorry to answer late but..

Step-by-step explanation:

$\frac{1}{75} cm$ = $\frac{scale }{real}$

the wings of the real plane are 12 meters or 1200 cm

we want to solve for the scale, sooo do the algebra...get scale by it self..

real * $\frac{1}{75}$ = scale

1200 * $\frac{1}{75}$ = 16

The scale model wings are 16 cm 2.54 cm is one inch so the wings are approx. 6.3 inches

4 0

2 years ago

The age of the Hawaiian islands gets older as you move from east to west. If the half-life of K-40 is 1.3 billion years, approxi

Mumz [18]

Answer:

$t \approx 750550.12\,yr$

Step-by-step explanation:

The time constant of the isotope is:

$\tau = \frac{1.3\times 10^{9}\,yr}{\ln 2}$

$\tau \approx 1.876 \times 10^{9}\,yr$

The decay of the isotope is described by the following model:

$\frac{m}{m_{o}} = e^{-\frac{t}{\tau} }$

Now, the time is cleared in the equation:

$t = -\tau \cdot \ln \frac{m}{m_{o}}$

$t = - (1.876\times 10^{9}\,yr)\cdot \ln 0.9996$

$t \approx 750550.12\,yr$

5 0

3 years ago

2.5 pounds of grapes cost $2.25 what is the cost per pound

Sergeeva-Olga [200]

Answer:

$0.9 per pound

Step-by-step explanation:

$2.25 divided by 2.5

3 0

3 years ago

Read 2 more answers

Find the slope of the line on the graph.

mars1129 [50]

Answer:

M= -3

Step-by-step explanation:

The two points on the graph are (0,4) and(1,1), using the slope formula you get a slope of - 3

3 0

3 years ago

Jackson started writing a story at 8:30 AM He stopped writing at 1:15 P.M. How long did he write?​

Jackson started writing a story at 8:30 AM He stopped writing at 1:15 P.M. How long did he write?