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1.

5×5×5

a)

110

b)

115

c)

120

d)

125

2.

x(t) is a (a) signal if

x(t) = 0, t < 0

3.

A signal y(t) can only be described in terms of mean value or mean square value. This signal is said to be a (a) signal.

4.

Eric bought 2 bags of potatoes. There were 78 potatoes in each bag. How many potatoes did Eric buy?

What operation are you doing?

a)

multiplication

b)

division

c)

subtraction

d)

addition

5.

a)

Addition

b)

Subtraction

c)

Multiplication

d)

Division

6.

Multiply

a)

5 / 18

b)

16 / 15

c)

28 / 9

d)

4 / 9

7.

Reduce: 6/15

a)

2/5

b)

3/5

c)

4/9

8.

Multiply

a)

6

b)

4 / 45

c)

20

d)

7 /45

9.

a)

Addition

b)

Subtraction

c)

Multiplication

d)

Division

10.

A city bought 2 pieces of land to build a new highway. Each piece of land cost the city $274,390. How much did the city spend on the land?

What operation are you doing?

a)

multiplication

b)

division

c)

subtraction

d)

addition

11.

A bagel factory produced 5 bags of bagels. There were 17 bagels in each bag. How many bagels did the factory produce?

What operation are you doing?

a)

multiplication

b)

division

c)

subtraction

d)

addition

12.

An art dealer bought a set of 7 beautiful vases. Each of the vases is worth $3,639. How much is the set of vases worth in all?

What operation are you doing?

a)

multiplication

b)

division

c)

subtraction

d)

addition

13.

a)

Addition

b)

Subtraction

c)

Multiplication

d)

Division

14.

A school needs 3,192 notebooks for next year. If the notebooks come in packages of 7, how many packages should the school buy?

What operation are you doing?

a)

multiplication

b)

division

c)

subtraction

d)

addition

15.

a)

Addition

b)

Subtraction

c)

Multiplication

d)

Division

16.

A marching band has 90 members. When they march in the town parade, the band puts 5 members in each row. How many rows will the band have in the parade?

What operation are you doing?

a)

multiplication

b)

division

c)

subtraction

d)

addition

17.

60,669 zebra mussels ride into Lake Michigan on the bottom of a ship. They find lots of food and no predators, so their population grows. A year later, there are 7 more zebra mussels in the lake. How many zebra mussels are there now?

What operation are you doing?

a)

multiplication

b)

division

c)

subtraction

d)

addition

18.

Consider a continuous-time system with an input $x\left(t\right)$ and output $y\left(t\right)$ given by:

y\left(t\right)=x\left(\sin\left(t\right)\right)

.
Is this system causal or non-causal?

a)

Causal

b)

Non-causal

19.

A continuous-time system is one where continuous-time input signals are transformed into __________________.

a)

discrete-time output signals

b)

harmonic signals

c)

continuous-time output signals

d)

continuous-time period signals

20.

What is the quotient of these fractions in lowest terms?

a)

6/40

b)

6/10

c)

3/5

d)

12/20

21.

3×3×3

a)

9

b)

18

c)

27

d)

36

22.

How do you write 8.317 x 10⁶in standard form?

(a)

23.

How would you write -5.6 x 10^-3 in standard form?

(a)

24.

$จงเขียน\ \ 25ล้านล้าน\ \ \ ในรูปสัญกรณ์วิทยาศาสตร์$

a)

$2.5\times10^{10}$

b)

$2.5\times10^{11}$

c)

$2.5\times10^{12}$

d)

$2.5\times10^{13}$

25.

Convert to scientific notation:

520,000,000

a)

52 x 10⁷

b)

5.2 x 10^-7

c)

5.2 x 10⁸

d)

0.52 x 10⁹

26.

$จงเขียน\ \ 425.1\ ×\ 10^{2\ }ในรูปสัญกรณ์วิทยาศาสตร์$

a)

$4.251\times10^3$

b)

$42.51\times10^3$

c)

$4.251\times10^4$

d)

$0.4251\times10^5$

27.

Which value is the greatest?

a)

5.0 x 10^-9

b)

5.0 x 10^-4

c)

5.0 x 10⁶

d)

5.0 x 10⁸

28.

7.82 x 10^-⁶ is an example of scientific notation. The exponent of -6 tells you your number will be very ________.

a)

Large

b)

Small

c)

Basic

29.

ข้อเป็นสัญกรณ์วิทยาศาสตร์ของ 0.000123

a)

1.23x10^-4

b)

1.23x10^-2

c)

1.23x10²

d)

1.23x10⁴

30.

Estimate $8.375\times10^{-23}$ .

a)

$9\times10^{-23}$ lb

b)

$8.5\times10^{-22}$ lb

c)

$8.4\times10^{-20}$ lb

d)

$8\times10^{-23}$ lb

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Total questions: 30

Worksheet time: 32mins

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