Select the correct answer.

<img src="https://tex.z-dn.net/?f=%5Cint%5Climits%5Ea_b%20%7B7x%7D%20%5C%2C%20dx" id="TexFormula1" title="\int\limits^a_b {7x} \

Dafna11 [192]

Answer:

$\frac{7}{2}a^2 - \frac{7}{2}b^2$

Explanation:

$\int\limits^a_b {7x} \, dx$

$=[\frac{7}{2}x^2]^a_b$

$=\frac{7}{2}a^2 - \frac{7}{2}b^2$

5 0

2 years ago

Which statement about direct-mail messages is most accurate? Group of answer choices Direct mail is an effective channel for per

torisob [31]

Answer:

Option A

Direct mail is an effective channel for personalized, tangible, three-dimensional messages that are less invasive than telephone solicitations

Explanation:

In modern days, we've seen email marketing hence option B that "Today's companies no longer send direct-mail messages to market their products or services; they rely exclusively on electronic media instead." These companies rely also on direct mails to their clients. Online marketing often uses direct mail for persuasion of their customers hence the last option is also wrong. Considering that already two statements are identified as inaccurate, the option that "All answer choices are accurate statements about direct-mail messages. " is misleading. Therefore, the only most accurate choice about direct-mail is option A

4 0

3 years ago

A system of organization, people activities, informations, and resources involved in supplying a productor or service to a custo

Nitella [24]

The supply chain!!

No explanation

3 0

1 year ago

Read 2 more answers

A manager has a list of items that have been sorted according to an item ID. Some of them are duplicates. She wants to add a cod

ruslelena [56]

Answer:

The solution code is written in Python:

items = [{"id": 37697, "code": ""},{"id": 37698, "code": ""},{"id": 37699, "code": ""},{"id": 37699, "code": ""}, {"id": 37699, "code": ""},
{"id": 37699, "code": ""},{"id": 37699, "code": ""},{"id": 37699, "code": ""},{"id": 37700, "code": ""} ]
items[0]["code"] = 1
for i in range(1, len(items)):
if(items[i]["id"] == items[i-1]["id"]):
items[i]["code"] = items[i-1]["code"] + 1
else:
items[i]["code"] = 1
print(items)

Explanation:

Firstly, let's create a list of dictionary objects. Each object holds an id and a code (Line 1-2). Please note all the code is initialized with zero at the first beginning.

Next, we can assign 1 to the <em>code</em> property of items[0] (Line 4).

Next, we traverse through the items list started from the second element (Line 6). We set an if condition to check if the current item's id is equal to the previous item (Line 7). If so, we assign the previous item's code + 1 to the current item's code (Line 8). If not, we assign 1 to the current item's code (Line 10).

At last, we print out the item (Line 12) and we shall get

[{'id': 37697, 'code': 1}, {'id': 37698, 'code': 1}, {'id': 37699, 'code': 1}, {'id': 37699, 'code': 2}, {'id': 37699, 'code': 3}, {'id': 37699, 'code': 4}, {'id': 37699, 'code': 5}, {'id': 37699, 'code': 6}, {'id': 37700, 'code': 1}]

6 0

3 years ago

How do Solar Engineers Help Humans?<br> (2 or more sentences please)

Gennadij [26K]

Solar engineers work in any number of areas of engineering products that help harness energy from the sun. They may research, design, and develop new products, or they may work in testing, production, or maintenance. They may collect and manage data to help design solar systems.

8 0

2 years ago