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stira [4]
3 years ago
11

Find the surface area of the pyramid. The side lengths of the base are equal.

Mathematics
2 answers:
3241004551 [841]3 years ago
5 0

Answer:

er32

tyhg

Step-by-step explanation:

5you

try

try

it

t4

we

kati45 [8]3 years ago
3 0

Answer:

The answer is 172.8 square yards

Step-by-step explanation:

Hope this helped you.

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The table shows information about the numbers of hours 30 children spent on their tablets one evening. a) find the class interva
Bogdan [553]

Answer:

a) 20<h≤30.

b) 26.17 hrs

Step-by-step explanation:

The missing table is shown in attachment.

Part a)

We need to find the class interval that contains the median.

The total frequency is

\sum \: f = 30

The median class corresponds to half

\frac{1}{2}  \sum \: f ^{th}  -  -  - value

That is the 15th value.

We start adding the frequency from the top obtain the least cumulative frequency greater or equal to 15.

2+8+9=19

This corresponds to the class interval 20<h≤30.

Adding from the bottom also gives the same result.

Therefore the median class is 20<h≤30.

b) Since this is a grouped data we use the midpoint to represent the class.

The median is given by :

\frac{\sum \: fx}{ \sum\: f}

=  \frac{5 \times 3 + 15\times 8 + 25 \times 9 + 35 \times 7 + 45 \times 4}{30}

=  \frac{785}{30}

= 26.17

8 0
3 years ago
Read 2 more answers
NEED HELP PLEASE BEGGING PLEASE!!!!
Sliva [168]

Answer:

-54

Step-by-step explanation:

8(-9) - 6(-3)\\

Multiply 8 by -9 and 6 by -3

-72 - (-18)

SubtractValue = -54

Hope this helps

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6 0
3 years ago
Using significant digits calculate (3.89 + 0.046) x 7.221
enyata [817]
The full answer is 28.421856
8 0
3 years ago
Kalani bought 2.5 pounds oranges for $1.58 per pound.how much did kalani spend on oranges ?
Tcecarenko [31]

To find the answer for this simply multiply 2.5 by 1.58

2.5 x 1.58= 3.95

So Kalani spent a total of $3.95 on oranges!

6 0
3 years ago
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A geologist have two rocks on a scale that weighs 2 1/2 lbs together rock a was 1/7 of a the total weight how much did rock a we
oee [108]
2/35, just ask your calculator what is one seventh of two and one half.<span />
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3 years ago
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