Which statement best explains the effectiveness of this introduction paragraph? Why purchase expensive gifts when homemade gifts are less expensive and more personal? According to Brandi McMichael, owner of Heartfelt Crafts Boutique, many store-bought gifts can be made for half the cost. No matter what the occasion, you can hand make a unique and meaningful present for a friend or relative with almost no crafting experience. To make the perfect present, all you need are a few basic supplies, an Internet connection, and a willingness to learn O A. The introduction is effective because the main point of the essay is established in the opening sentence B. Although the introduction establishes a strong claim it is ineffective because it does not use a phrase like "This essay will be about to directly state the author's intentions O C. Although the introduction presents valid background information, it is ineffective because the main point of the essay is unclear​

I believe the answer is A. I hope this helps, correct me if I'm wrong.

Explanation:

Answer is is D.

The introduction is effective bc it starts with an intriguing suggestion and gives additional information to back it up.

Explanation:

what do u want me to answer?

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: